diff --git a/cicaprojekt/Tile.java b/cicaprojekt/Tile.java
index 8ba3c6d..05f9868 100644
--- a/cicaprojekt/Tile.java
+++ b/cicaprojekt/Tile.java
@@ -2,10 +2,12 @@ package cicaprojekt;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Stack;
 
 public abstract class Tile {
 	protected Map<Direction, Tile> adjacentTile;
-	private Pickable itemOnTile;
+	protected ZPM zpmOnTile;
+	protected Stack<Box> boxStack;
 	
 	
 	public Tile(){
@@ -15,7 +17,7 @@ public abstract class Tile {
 		adjacentTile.put(Direction.EAST, Field.testField);
 		adjacentTile.put(Direction.SOUTH, Field.testField);
 		adjacentTile.put(Direction.WEST, Field.testField);
-		itemOnTile = new Box();
+		zpmOnTile = new ZPM();
 	}
 	
 	public Tile getAdjacentTile(Direction direction) {
@@ -32,13 +34,17 @@ public abstract class Tile {
 	
 	public abstract void onExit(PlayerBase playerBase);
 	
-	public Pickable removeItemFromTile() {
-		Pickable item = itemOnTile;
-		itemOnTile = null;
-		return item;
+	public ZPM getZPMFromTile() {
+		ZPM zpm = zpmOnTile;
+		zpmOnTile = null;
+		return zpm;
 	}
 	
-	public void setItemOnTile(Pickable item) {
-		itemOnTile = item;
+	public void putABox(Box box) {
+		boxStack.push(box);
+	}
+	
+	public Box getABox(){
+		return boxStack.pop();
 	}
 }