diff --git a/core/src/com/trs/game/Controller.java b/core/src/com/trs/game/Controller.java
index 42beb34..6034cc8 100644
--- a/core/src/com/trs/game/Controller.java
+++ b/core/src/com/trs/game/Controller.java
@@ -142,6 +142,11 @@ public class Controller extends ApplicationAdapter implements InputProcessor {
 			//
 			renderer.end();
 
+			// write left Length
+			batch.begin();
+			font.setColor(Color.BLACK);
+			font.draw(batch, ""+model.getLeftWallLength(), 1500f,800f);
+			batch.end();
 			// DRAW MONSTER
 			//model.getMonster().drawMonster(renderer,polygonSpriteBatch);
 		}
diff --git a/core/src/com/trs/game/model/Model.java b/core/src/com/trs/game/model/Model.java
index 2a8f2cd..884bebd 100644
--- a/core/src/com/trs/game/model/Model.java
+++ b/core/src/com/trs/game/model/Model.java
@@ -1,5 +1,6 @@
 package com.trs.game.model;
 
+import com.badlogic.gdx.math.Intersector;
 import com.badlogic.gdx.math.Polygon;
 import com.badlogic.gdx.math.Vector2;
 import com.trs.game.StaticMath;
@@ -14,6 +15,8 @@ public class Model {
     private Vector2 tempStart;
     private boolean drawing = false;
 
+    private int leftWallLength = 2500;
+
     public Model(){
         monster = new Monster(250,150);
         walls = new ArrayList<>();
@@ -45,10 +48,25 @@ public class Model {
         }
     }
     public void finishWall(int x, int y){
-        if(Vector2.dst(tempStart.x,tempStart.y,x,y) > 50) {
+        if(Vector2.dst(tempStart.x,tempStart.y,x,y) > 150) {
             double angle = StaticMath.calculateAngle(x,y,(int)tempStart.x,(int)tempStart.y);
             tempPolygon = StaticMath.createPolygon((int)tempStart.x, (int)tempStart.y, Math.toDegrees(angle-Math.PI),10,Vector2.dst(tempStart.x,tempStart.y,x,y));
-            walls.add(new TempWall(Math.toDegrees(angle-Math.PI), tempPolygon, 500));
+
+            boolean possible = true;
+            if(Vector2.dst(tempStart.x,tempStart.y,x,y) > leftWallLength)
+                possible = false;
+            if(possible)
+            for(Wall wall : walls){
+                if(Intersector.overlapConvexPolygons(tempPolygon, wall.getPolygon())){
+                    possible = false;
+                    break;
+                }
+            }
+
+            if(possible){
+                leftWallLength -= Vector2.dst(tempStart.x,tempStart.y,x,y);
+                walls.add(new TempWall(Math.toDegrees(angle-Math.PI), tempPolygon, 500));
+            }
         }
         tempPolygon = null;
         tempStart = null;
@@ -71,4 +89,8 @@ public class Model {
     public Polygon getTempPolygon() {
         return tempPolygon;
     }
+
+    public int getLeftWallLength() {
+        return leftWallLength;
+    }
 }