diff --git a/src/backend/Simulator.java b/src/backend/Simulator.java
index b9425fe..7a8a136 100644
--- a/src/backend/Simulator.java
+++ b/src/backend/Simulator.java
@@ -315,11 +315,10 @@ public class Simulator extends Thread {
 	}
 
 	public void loadRule(ArrayList<String> lines) {
-		if(lines.size()<=0) {
-			System.out.println("empty rule file");
-			return;
+		if (lines.size() < 4) {
+		    System.out.println("Error: Insufficient number of lines for loading rules.");
+		    return;
 		}
-		//TODO : remove previous rule (=emptying lists)
 		
 		
 		String surviveLine = lines.get(0);
@@ -328,15 +327,14 @@ public class Simulator extends Thread {
 		for(int x=0; x<surviveElements.length;x++) {
 			String elem = surviveElements[x];
 			int value = Integer.parseInt(elem);
-			//TODO : add value to possible survive values
-			
+			fieldSurviveValues.add(value);
 		}
+		
 		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
-			
+			fieldBirthValues.add(value);			
 		}
 	}