diff --git a/Rule/ConwayRule.csv b/Rule/ConwayRule.csv
index 009a7ad..1d93ca8 100644
--- a/Rule/ConwayRule.csv
+++ b/Rule/ConwayRule.csv
@@ -1,2 +1,2 @@
-2;3
-3
\ No newline at end of file
+[1, 3, 5, 8]
+[3, 5, 7]
diff --git a/src/backend/Agent.java b/src/backend/Agent.java
index 8b11e23..f1fb639 100644
--- a/src/backend/Agent.java
+++ b/src/backend/Agent.java
@@ -7,34 +7,31 @@ public abstract class Agent {
 	protected int x;
 	protected int y;
 	protected Color color;
-	
+
 	protected Agent(int x, int y, Color color) {
 		this.x = x;
 		this.y = y;
 		this.color = color;
 	}
-	
+
 	public Color getDisplayColor() {
 		return color;
 	}
+
 	public int getX() {
 		return x;
 	}
+
 	public int getY() {
 		return y;
 	}
+
 	public boolean isInArea(int x, int y, int radius) {
-		int diffX = this.x-x;
-		int diffY = this.y-y;
-		int dist = (int) Math.floor(Math.sqrt(diffX*diffX+diffY*diffY));
-		return dist<radius;
+		int diffX = this.x - x;
+		int diffY = this.y - y;
+		int dist = (int) Math.floor(Math.sqrt(diffX * diffX + diffY * diffY));
+		return dist < radius;
 	}
-	
-	// Does whatever the agent does during a step
-	// then returns a boolean
-	// if false, agent dies at end of turn
-	// see step function in Simulator
+
 	public abstract boolean liveTurn(ArrayList<Agent> neighbors, Simulator world);
-	
-	
 }
diff --git a/src/backend/Grid.java b/src/backend/Grid.java
new file mode 100644
index 0000000..b7c226c
--- /dev/null
+++ b/src/backend/Grid.java
@@ -0,0 +1,105 @@
+
+package backend;
+import java.util.ArrayList;
+
+public class Grid {
+	// Private fields to store the grid data and dimensions
+    private int[][] cells;
+    private int width;
+    private int height;
+
+ //Constructor to initialize the grid with given the width and height
+    public Grid(int width, int height) {
+        this.width = width;
+        this.height = height;
+        this.cells = new int[width][height];
+    }
+    
+
+ // Getter methods to retrieve the grid dimensions
+    public int getWidth() {
+        return width;
+    }
+    public int getHeight() {
+        return height;
+    }
+
+ // Getter and setter methods for individual cells
+    public int getCell(int x, int y) {
+        return cells[x][y];
+    }
+    public void setCell(int x, int y, int val) {
+        cells[x][y] = val;
+    }
+
+ //Method to change the state of a cell (0=not colored, 1=colored)
+    public void toggleCell(int x, int y) {
+        cells[x][y] = (cells[x][y] == 0) ? 1 : 0;
+    }
+
+    
+    
+ // Method to save the current state of the grid to an ArrayList of strings
+    public ArrayList<String> saveState() {
+        ArrayList<String> state = new ArrayList<>();
+        for (int x = 0; x < width; x++) {
+            StringBuilder row = new StringBuilder();
+            for (int y = 0; y < height; y++) {
+                row.append(cells[x][y]).append(";");
+            }
+            state.add(row.toString());
+        }
+        return state;
+    }
+
+ // Method to load the state of the grid from an ArrayList of strings
+    public void loadState(ArrayList<String> lines) {
+        for (int x = 0; x < lines.size(); x++) {
+            String[] values = lines.get(x).split(";");
+            for (int y = 0; y < values.length; y++) {
+                cells[x][y] = Integer.parseInt(values[y]);
+            }
+        }
+    }
+
+ // Method to update the cells of the grid based on game of life rules
+    public void updateCells(ArrayList<Integer> surviveRules, ArrayList<Integer> birthRules, boolean loopingBorder) {
+        int[][] newCells = new int[width][height];
+        for (int x = 0; x < width; x++) {
+            for (int y = 0; y < height; y++) {
+                int neighbors = countNeighbors(x, y, loopingBorder);
+                if (cells[x][y] == 1) {
+                    newCells[x][y] = (surviveRules.contains(neighbors)) ? 1 : 0;
+                } else {
+                    newCells[x][y] = (birthRules.contains(neighbors)) ? 1 : 0;
+                }
+            }
+        }
+        cells = newCells;
+    }
+
+    
+    
+   
+ // Method to count the number of live neighbors of a cell
+    private int countNeighbors(int x, int y, boolean loopingBorder) {
+        int count = 0;
+        for (int i = -1; i <= 1; i++) {
+            for (int j = -1; j <= 1; j++) {
+                if (i == 0 && j == 0)
+                    continue;
+                int nx = x + i;
+                int ny = y + j;
+                if (loopingBorder) {
+                    nx = (nx + width) % width;
+                    ny = (ny + height) % height;
+                }
+                if (nx >= 0 && nx < width && ny >= 0 && ny < height) {
+                    count += cells[nx][ny];
+                }
+            }
+        }
+        
+        return count;
+    }
+}
diff --git a/src/backend/Sheep.java b/src/backend/Sheep.java
index ece8a18..bcf1a7b 100644
--- a/src/backend/Sheep.java
+++ b/src/backend/Sheep.java
@@ -4,56 +4,22 @@ import java.awt.Color;
 import java.util.ArrayList;
 import java.util.Random;
 
-// example of basic animal.
-// do not hesitate to make it more complex
-// and DO add at least another species that interact with it
-// for example wolves that eat Sheep
 public class Sheep extends Agent {
-	
 	int hunger;
 	Random rand;
-	
-	Sheep(int x,int y){
-		//first we call the constructor of the superClass(Animal)
-		//with the values we want.
-		// here we decide that a Sheep is initially white using this constructor
-		super(x,y,Color.white);
-		// we give our sheep a hunger value of zero at birth
+
+	public Sheep(int x, int y) {
+		super(x, y, Color.white);
 		hunger = 0;
-		//we initialize the random number generator we will use to move randomly
 		rand = new Random();
 	}
-
-	/**
-	 * action of the animal
-	 * it can interact with the cells or with other animals
-	 * as you wish
-	 */
+//The method replaces the superclass method animal
+	@Override
 	public boolean liveTurn(ArrayList<Agent> neighbors, Simulator world) {
-		if(world.getCell(x, y)==1) {
-			world.setCell(x, y, 0);
-		} else {
-			hunger++;
-		}
-		this.moveRandom();
-		return hunger>10;
+		// To make the sheep moving randomly
+		x += rand.nextInt(3) - 1;
+		y += rand.nextInt(3) - 1;
+		hunger++;
+		return hunger < 20; // The sheep dies if it reaches maximum hunger
 	}
-
-	private void moveRandom() {
-		int direction = rand.nextInt(4);
-		if(direction == 0) {
-			x+=1;
-		}
-		if(direction == 1) {
-			y+=1;
-		}
-		if(direction == 2) {
-			x-=1;
-		}
-		if(direction == 3) {
-			y-=1;
-		}
-	}
-
-
 }
diff --git a/src/backend/Simulator.java b/src/backend/Simulator.java
index 9774cd3..c668b9f 100644
--- a/src/backend/Simulator.java
+++ b/src/backend/Simulator.java
@@ -1,68 +1,66 @@
 package backend;
-import java.util.ArrayList;
 
+import java.util.Random;
+import java.util.ArrayList;
 import windowInterface.MyInterface;
 
+// Simulator class that controls the lifecycle and rules of the simulation
 public class Simulator extends Thread {
-
 	private MyInterface mjf;
-	
-	private final int COL_NUM = 100;
-	private final int LINE_NUM = 100;
-	private final int LIFE_TYPE_NUM = 4;
-	//Conway Radius : 1
-	private final int LIFE_AREA_RADIUS = 1;
-	//Animal Neighborhood Radius : 5
-	private final int ANIMAL_AREA_RADIUS = 2;
-	private ArrayList<Integer> fieldSurviveValues;
-	private ArrayList<Integer> fieldBirthValues;
-	
-	private ArrayList<Agent> agents;
-	
+	private World world;
+	private ArrayList<Integer> surviveRules;
+	private ArrayList<Integer> birthRules;
 	private boolean stopFlag;
 	private boolean pauseFlag;
 	private boolean loopingBorder;
-	private boolean clickActionFlag;
 	private int loopDelay = 150;
+	private int clickActionFlag;
 
-	//TODO : add missing attribute(s)
-
+	//The constructor initializes the simulator with a user interface parameter
 	public Simulator(MyInterface mjfParam) {
-		mjf = mjfParam;
-		stopFlag=false;
-		pauseFlag=false;
-		loopingBorder=false;
-		clickActionFlag=false;
+		this.mjf = mjfParam;
+		this.world = new World(100, 100); // Set world size to 100x100
+		this.stopFlag = false;
+		this.pauseFlag = false;
+		this.loopingBorder = false;
+		this.clickActionFlag = 0; // 0 for cell, 1 for agent
+		this.surviveRules = new ArrayList<>();
+		this.birthRules = new ArrayList<>();
+		initializeDefaultRules();
+	}
 
-		agents = new ArrayList<Agent>();
-		fieldBirthValues = new ArrayList<Integer>();
-		fieldSurviveValues = new ArrayList<Integer>();
-
-		//TODO : add missing attribute initialization
-		
-		
-		
-		//Default rule : Survive always, birth never
-		for(int i =0; i<9; i++) {
-			fieldSurviveValues.add(i);
+	
+	// Initialization of the default survival rules for the simulation
+	private void initializeDefaultRules() {
+		for (int i = 0; i < 9; i++) {
+			surviveRules.add(i);
 		}
-		
 	}
 
+	// To retrieves neighbors of a specified agent in a certain radius
+	public ArrayList<Agent> getNeighbors(Agent agent) {
+		ArrayList<Agent> neighbors = new ArrayList<>();
+		for (Agent other : world.getAgents()) {
+			if (other != agent && agent.isInArea(other.getX(), other.getY(), 1)) { // Assuming radius of 1
+				neighbors.add(other);
+			}
+		}
+		return neighbors;
+	}
+
+	// Getter methods for world dimensions
 	public int getWidth() {
-		//TODO : replace with proper return
-		return 0;
+		return world.getGrid().getWidth();
 	}
-
 	public int getHeight() {
-		//TODO : replace with proper return
-		return 0;
+		return world.getGrid().getHeight();
 	}
 
-	//Should probably stay as is
+	// The main run method for the thread that handles simulation steps
+	@Override
 	public void run() {
-		int stepCount=0;
-		while(!stopFlag) {
+		int stepCount = 0;
+		while (!stopFlag) {
 			stepCount++;
 			makeStep();
 			mjf.update(stepCount);
@@ -71,7 +69,7 @@ public class Simulator extends Thread {
 			} catch (InterruptedException e) {
 				e.printStackTrace();
 			}
-			while(pauseFlag && !stopFlag) {
+			while (pauseFlag && !stopFlag) {
 				try {
 					Thread.sleep(loopDelay);
 				} catch (InterruptedException e) {
@@ -79,254 +77,159 @@ public class Simulator extends Thread {
 				}
 			}
 		}
-
 	}
 
-	/**
-	 * method called at each step of the simulation
-	 * makes all the actions to go from one step to the other
-	 */
 	public void makeStep() {
-		// agent behaviors first
-		// only modify if sure of what you do
-		// to modify agent behavior, see liveTurn method
-		// in agent classes
-		for(Agent agent : agents) {
-			ArrayList<Agent> neighbors = 
-					this.getNeighboringAnimals(
-					agent.getX(), 
-					agent.getY(), 
-					ANIMAL_AREA_RADIUS);
-			if(!agent.liveTurn(
-					neighbors,
-					this)) {
-				agents.remove(agent);
-			}
-		}
-		//then evolution of the field
-		// TODO : apply game rule to all cells of the field
-		
-		/* you should distribute this action in methods/classes
-		 * don't write everything here !
-		 * 
-		 * the idea is first to get the surrounding values
-		 * then count how many are alive
-		 * then check if that number is in the lists of rules
-		 * if the cell is alive 
-		 * 		and the count is in the survive list,
-		 * 		then the cell stays alive
-		 * if the cell is not alive
-		 * 		and the count is in the birth list,
-		 * 		then the cell becomes alive 	
-		 */
-		
-		
-		
-		
+		world.processAgentTurns(this);
+		world.updateGrid(surviveRules, birthRules, loopingBorder);
 	}
 	
-	/*
-	 * leave this as is
-	 */
+	
+
+	// Stop the simulation
 	public void stopSimu() {
-		stopFlag=true;
+		stopFlag = true;
 	}
-	
-	/*
-	 * method called when clicking pause button
-	 */
+	// Pause the simulation
 	public void togglePause() {
-		// TODO : actually toggle the corresponding flag
+		pauseFlag = !pauseFlag;
 	}
+
 	
-	/**
-	 * method called when clicking on a cell in the interface
-	 */
+	// Handles cell click actions based on the current clickActionFlag
 	public void clickCell(int x, int y) {
-		//TODO : complete method
+		if (clickActionFlag == 0) {
+			world.getGrid().toggleCell(x, y);
+		} else {
+			world.addAgent(new Sheep(x, y));
+		}
 	}
+
 	
-	/**
-	 * get cell value in simulated world
-	 * @param x coordinate of cell
-	 * @param y coordinate of cell
-	 * @return value of cell
-	 */
+	// To returns the state of a cell at a given coordinate
 	public int getCell(int x, int y) {
-		//TODO : complete method with proper return
-		return 0;
+		return world.getGrid().getCell(x, y);
 	}
-	/**
-	 * 
-	 * @return list of Animals in simulated world
-	 */
-	public ArrayList<Agent> getAnimals(){
-		return agents;
+
+	// To retrieves all animals in the simulation
+	public ArrayList<Agent> getAnimals() {
+		return new ArrayList<>(world.getAgents());
 	}
-	/**
-	 * selects Animals in a circular area of simulated world
-	 * @param x center
-	 * @param y center
-	 * @param radius
-	 * @return list of agents in area
-	 */
-	public ArrayList<Agent> getNeighboringAnimals(int x, int y, int radius){
-		ArrayList<Agent> inArea = new ArrayList<Agent>();
-		for(int i=0;i<agents.size();i++) {
-			Agent agent = agents.get(i);
-			if(agent.isInArea(x,y,radius)) {
+
+	public ArrayList<Agent> getNeighboringAnimals(int x, int y, int radius) {
+		ArrayList<Agent> inArea = new ArrayList<>();
+		for (Agent agent : world.getAgents()) {
+			if (agent.isInArea(x, y, radius)) {
 				inArea.add(agent);
 			}
 		}
 		return inArea;
 	}
-
-	/**
-	 * set value of cell
-	 * @param x coord of cell
-	 * @param y coord of cell
-	 * @param val to set in cell
-	 */
 	public void setCell(int x, int y, int val) {
-		//TODO : complete method
+		world.getGrid().setCell(x, y, val);
 	}
-	
-	/**
-	 * 
-	 * @return lines of file representing 
-	 * the simulated world in its present state
-	 */
 	public ArrayList<String> getSaveState() {
-		//TODO : complete method with proper return
-		return null;
+		return world.getGrid().saveState();
 	}
-	/**
-	 * 
-	 * @param lines of file representing saved world state
-	 */
 	public void loadSaveState(ArrayList<String> lines) {
-		/*
-		 * First some checks that the file is usable
-		 * We call early returns in conditions like this
-		 * "Guard clauses", as they guard the method
-		 * against unwanted inputs
-		 */
-		if(lines.size()<=0) {
-			return;
+		world.getGrid().loadState(lines);
+	}
+
+	
+	// Generates random initial states based on a given life chance
+	public void generateRandom(float chanceOfLife) {
+		Random rand = new Random();
+		for (int x = 0; x < getWidth(); x++) {
+			for (int y = 0; y < getHeight(); y++) {
+				world.getGrid().setCell(x, y, (rand.nextFloat() < chanceOfLife) ? 1 : 0);
+			}
 		}
-		String firstLine = lines.get(0);
-		String[] firstLineElements = firstLine.split(";");
-		if(firstLineElements.length<=0) {
-			return;
-		}
-		/*
-		 * now we fill in the world 
-		 * with the content of the file
-		 */
-		for(int y =0; y<lines.size();y++) {
-			String line = lines.get(y);
-			String[] lineElements = line.split(";");
-			for(int x=0; x<lineElements.length;x++) {
-				String elem = lineElements[x];
-				int value = Integer.parseInt(elem);
-				setCell(x, y, value);
+	}
+	public boolean isLoopingBorder() {
+		return loopingBorder;
+	}
+
+	
+	// Switch between using or not using looping borders
+	public void toggleLoopingBorder() {
+		loopingBorder = !loopingBorder;
+	}
+
+	//Set the delay between the simulation loops
+	public void setLoopDelay(int delay) {
+		loopDelay = delay;
+	}
+
+	// Change the action performed when clicking in the world grid
+	public void toggleClickAction() {
+		clickActionFlag = (clickActionFlag == 0) ? 1 : 0;
+	}
+
+	
+	public ArrayList<String> getRule() {
+		ArrayList<String> rules = new ArrayList<>();
+		rules.add(String.join(";", surviveRules.toString()));
+		rules.add(String.join(";", birthRules.toString()));
+		return rules;
+	}
+
+	
+	public void loadRule(ArrayList<String> lines) {
+		surviveRules.clear();
+		birthRules.clear();
+		if (!lines.isEmpty()) {
+			// Handle the survival rules from the first line
+			String[] survivalNumbers = extractNumbers(lines.get(0));
+			for (String num : survivalNumbers) {
+				if (!num.isEmpty()) {
+					surviveRules.add(Integer.parseInt(num.trim()));
+				}
+			}
+			// Handle the birth rules from the second line (if it exists)
+			if (lines.size() > 1) {
+				String[] birthNumbers = extractNumbers(lines.get(1));
+				for (String num : birthNumbers) {
+					if (!num.isEmpty()) {
+						birthRules.add(Integer.parseInt(num.trim()));
+					}
+				}
 			}
 		}
 	}
 
-	/**
-	 * called by button, with slider providing the argument
-	 * makes a new world state with random cell states
-	 * @param chanceOfLife the chance for each cell 
-	 * to be alive in new state
-	 */
-	public void generateRandom(float chanceOfLife) {
-		//TODO : complete method
-		/*
-		 * Advice :
-		 * as you should probably have a separate class
-		 * representing the field of cells...
-		 * maybe just make a constructor in there 
-		 * and use it here
-		 */
-	}
 	
-	public boolean isLoopingBorder() {
-		//TODO : complete method with proper return
-		return false;
-	}
 	
-	public void toggleLoopingBorder() {
-		//TODO : complete method
-		
-	}
-	
-	public void setLoopDelay(int delay) {
-		//TODO : complete method
-	}
-	
-	public void toggleClickAction() {
-		//TODO : complete method
+	private String[] extractNumbers(String line) {
+		line = line.trim().replaceAll("[\\[\\]]", ""); // Remove brackets if present
+		return line.split(",\\s*|;\\s*"); // Split by comma or semicolon with optional whitespace
 	}
 
-	/**
-	 * prepare the content of a file saving present ruleSet
-	 *  as you might want to save a state,
-	 *  initialy written in this class constructor 
-	 *  as a file for future use
-	 * @return File content as an ArrayList of Lines (String)
-	 * @see loadRule for inverse process
-	 */
-	public ArrayList<String> getRule() {
-		//TODO : complete method with proper return
-		
-		return null;
-	}
-
-	public void loadRule(ArrayList<String> lines) {
-		if(lines.size()<=0) {
-			System.out.println("empty rule file");
-			return;
-		}
-		//TODO : remove previous rule (=emptying lists)
-		
-		
-		String surviveLine = lines.get(0);
-		String birthLine = lines.get(1);
-		String[] surviveElements = surviveLine.split(";");
-		for(int x=0; x<surviveElements.length;x++) {
-			String elem = surviveElements[x];
-			int value = Integer.parseInt(elem);
-			//TODO : add value to possible survive values
-			
-		}
-		String[] birthElements = birthLine.split(";");
-		for(int x=0; x<birthElements.length;x++) {
-			String elem = birthElements[x];
-			int value = Integer.parseInt(elem);
-			//TODO : add value to possible birth values
-			
-		}
-	}
-	
 	public ArrayList<String> getAgentsSave() {
-		//TODO : Same idea as the other save method, but for agents
-		return null;
+		ArrayList<String> agentsList = new ArrayList<>();
+		for (Agent agent : world.getAgents()) {
+			agentsList.add(agent.getClass().getSimpleName() + "," + agent.getX() + "," + agent.getY());
+		}
+		return agentsList;
 	}
 
-	public void loadAgents(ArrayList<String> stringArray) {
-		//TODO : Same idea as other load methods, but for agent list
-		
+	
+	public void loadAgents(ArrayList<String> lines) {
+		world.getAgents().clear();
+		for (String line : lines) {
+			String[] data = line.split(";"); // Split using semicolons
+			String type = data[0].trim(); // Trim whitespace
+			int x = Integer.parseInt(data[1].trim().replace(",", "")); // Remove commas and trim spaces
+			int y = Integer.parseInt(data[2].trim().replace(",", "")); // Remove commas and trim spaces
+			if (type.equals("Sheep")) {
+				world.addAgent(new Sheep(x, y));
+			} else if (type.equals("Wolf")) {
+				world.addAgent(new Wolf(x, y));
+			}
+		}
 	}
 
-	/**
-	 * used by label in interface to show the active click action
-	 * @return String representation of click action
-	 */
+	
 	public String clickActionName() {
-		// TODO : initially return "sheep" or "cell"
-		// depending on clickActionFlag
-		return "";
+		return clickActionFlag == 0 ? "cell" : "sheep";
 	}
-
 }
diff --git a/src/backend/Wolf.java b/src/backend/Wolf.java
new file mode 100644
index 0000000..af68fa9
--- /dev/null
+++ b/src/backend/Wolf.java
@@ -0,0 +1,44 @@
+
+// We created a class for another animal : wolves
+// They eat sheeps
+
+package backend;
+
+import java.awt.Color;
+import java.util.ArrayList;
+import java.util.Random;
+
+public class Wolf extends Agent {
+    int hunger;
+    Random rand;
+
+    
+    public Wolf(int x, int y) {
+    	// We call the constructor of the superClass animal
+    	// Ande we decided that the wolves are gray
+        super(x, y, Color.gray);
+        // At birth, their hunger value is zero
+        hunger = 0;
+        //And we initialize the random number generator for their random movement
+        rand = new Random();
+    }
+
+  //The method replaces the superclass method animal
+    @Override
+    public boolean liveTurn(ArrayList<Agent> neighbors, Simulator world) {
+        for (Agent neighbor : neighbors) {
+            if (neighbor instanceof Sheep) {
+            	// To reset their hunger after eating
+                hunger = 0; 
+                 // And wolf survives by eating sheep
+                return true; 
+            }
+        }
+        // To make them move randomly
+        x += rand.nextInt(3) - 1;
+        y += rand.nextInt(3) - 1;
+        hunger++;
+        //The wolve dies if it starves
+        return hunger < 10; 
+    }
+}
diff --git a/src/backend/World.java b/src/backend/World.java
new file mode 100644
index 0000000..6035072
--- /dev/null
+++ b/src/backend/World.java
@@ -0,0 +1,61 @@
+package backend;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+
+public class World {
+	// Private fields to store the grid and the agents
+    private Grid grid;
+    private Set<Agent> agents;
+
+    
+ // Constructor to initialize the world with the grid and an empty set of agents
+    public World(int width, int height) {
+        this.grid = new Grid(width, height);
+        this.agents = new HashSet<>();
+    }
+    
+    
+    
+ //Getter method for the grid
+    public Grid getGrid() {
+        return grid;
+    }
+ //Getter method for the set of agents
+    public Set<Agent> getAgents() {
+        return agents;
+    }
+    
+    
+ // Method to add an agent to the world
+    public void addAgent(Agent agent) {
+        agents.add(agent);
+    }
+ // Method to remove it
+    public void removeAgent(Agent agent) {
+        agents.remove(agent);
+    }
+    
+    
+    
+ // Method to update the grid based on game of life rules
+    public void updateGrid(ArrayList<Integer> surviveRules, ArrayList<Integer> birthRules, boolean loopingBorder) {
+        grid.updateCells(surviveRules, birthRules, loopingBorder);
+    }
+ // Method to process turns for all agents and return the surviving ones
+    public Set<Agent> processAgentTurns(Simulator simulator) {
+        Set<Agent> survivingAgents = new HashSet<>();
+        for (Agent agent : agents) {
+        	
+        	// Call liveTurn method for each agent and add surviving ones to the set
+            if (agent.liveTurn(simulator.getNeighbors(agent), simulator)) {
+                survivingAgents.add(agent);
+            }
+        }
+        
+        
+        
+        return survivingAgents;
+    }
+}