diff --git a/core/src/com/trs/game/Controller.java b/core/src/com/trs/game/Controller.java
index c867ef6..b2b84ce 100644
--- a/core/src/com/trs/game/Controller.java
+++ b/core/src/com/trs/game/Controller.java
@@ -46,7 +46,7 @@ public class Controller extends ApplicationAdapter implements InputProcessor {
 		wallTimer.scheduleTask(new Timer.Task() {
 			@Override
 			public void run() {
-				// TODO: Implement timertask
+				model.timerStep();
 			}
 		}, 0, 1f);
 		font = new BitmapFont();
@@ -90,6 +90,14 @@ public class Controller extends ApplicationAdapter implements InputProcessor {
 		renderer.dispose();
 	}
 
+	public void timerStart(){
+		wallTimer.start();
+	}
+
+	public void timerStop(){
+		wallTimer.stop();
+	}
+
 	@Override
 	public boolean keyDown(int keycode) {
 		return false;
diff --git a/core/src/com/trs/game/model/Model.java b/core/src/com/trs/game/model/Model.java
index e924794..4e5c2c4 100644
--- a/core/src/com/trs/game/model/Model.java
+++ b/core/src/com/trs/game/model/Model.java
@@ -8,15 +8,22 @@ import java.util.ArrayList;
 public class Model {
     private Monster monster;
     private ArrayList<Wall> walls;
+    private ArrayList<Projectile> projectiles;
 
     public Model(){
         monster = new Monster(250,150);
         walls = new ArrayList<>();
         walls.add(new PermWall(20,new Rectangle(250,250,50,25)));
+
+        projectiles = new ArrayList<>();
     }
 
     public void timerStep(){
+        monster.move();
 
+        for(Projectile projectile : projectiles){
+            projectile.move();
+        }
     }
 
     public ArrayList<Wall> getWalls(){