added the move function for Ghost in GameManager class and Ghost move in random stage

src/main/java/pacmanGame/GameManager.java

@@ -33,6 +33,9 @@ public class GameManager {
 		visualizer.Update();
 		if(time%5 == 0) {
 			player.Move();
+			for(int i = 0; i<ghostCount; i++) {
+				ghosts[i].move();
+			}
 		}
 		if(time == 300) {
 			spawnCherry();

src/main/java/pacmanGame/Ghost.java

@@ -4,12 +4,13 @@ public class Ghost {
     public Vector2 position;
     public final GameManager gameManager;
     public final int ghostNumber;
-    
+    public GhostBehavior behavior;
 
     public Ghost(GameManager gameManager, int ghostNumber) {
         this.gameManager = gameManager;
         this.ghostNumber = ghostNumber;
         this.position = new Vector2(-1, -1);
+        behavior = new GhostBehaviorRandom();
     }
 
     public void setPosition(Vector2 newPosition) {
@@ -23,4 +24,7 @@ public class Ghost {
     public void spawn() {
     	this.position = gameManager.map.ghostSpawns[ghostNumber].Clone();
     }
+    public void move() {
+    	move(behavior.GetDirection(this));
+    }
 }