diff --git a/src/backend/Simulator.java b/src/backend/Simulator.java
index 8826654..41970c4 100644
--- a/src/backend/Simulator.java
+++ b/src/backend/Simulator.java
@@ -26,6 +26,7 @@ public class Simulator extends Thread {
 	private int loopDelay = 150;
 
 	//TODO : add missing attribute(s)
+	private double randomDansitySlider = 0.5;
 	private int width;
 	private int height;
 	private boolean enableLogs;
@@ -316,6 +317,13 @@ public class Simulator extends Thread {
 			System.out.println("Loop delay set to " + delay);
 		}
 	}
+
+	public void setDansity(double density) {
+		randomDansitySlider = density;
+		if (enableLogs) {
+			System.out.println("Density set to " + density);
+		}
+	}
 	
 	public void toggleClickAction() {
 		//TODO-COMPLETE : complete method
diff --git a/src/windowInterface/MyInterface.java b/src/windowInterface/MyInterface.java
index 67ae441..f506362 100644
--- a/src/windowInterface/MyInterface.java
+++ b/src/windowInterface/MyInterface.java
@@ -165,6 +165,11 @@ public class MyInterface extends JFrame {
 		randSlider.setMinimum(0);
 		randSlider.setMaximum(100);
 		randSlider.setPreferredSize(new Dimension(30,200));
+		randSlider.addChangeListener(new ChangeListener() {
+			public void stateChanged(ChangeEvent arg0) {
+				changeDansity();
+			}
+		});
 		panelRight.add(randSlider);
 		
 
@@ -254,6 +259,15 @@ public class MyInterface extends JFrame {
 		}
 	}
 
+	public void changeDansity() {
+		if(mySimu != null) {
+			double density = ((double)randSlider.getValue())/((double)randSlider.getMaximum());
+			mySimu.setDansity(density);
+		} else {
+			randSlider.setValue(50);
+		}
+	}
+
 	public void clicLoadFileButton() {
 		Simulator loadedSim = new Simulator(this);
 		String fileName=SelectFile();