added funtion Gohst moving in random stage

src/main/java/pacmanGame/GhostBehaviorRandom.java

@@ -4,7 +4,20 @@ public class GhostBehaviorRandom implements GhostBehavior {
 
 	@Override
 	public Vector2 GetDirection(Ghost ghost) {
-	
+		Random random = new Random();
+		int direction = random.nextInt(4);
+		switch(direction) {
+		case 0: //oben
+			return new Vector2(0,1);
+		case 1: //unten
+			return new Vector2(0,-1);
+		case 2:// links
+			return new Vector2(-1,0);
+		case 3: //rechts
+			return new Vector2(1,0);
+		default:
+			break;
+		}
 		return null;
 	}