void OnTriggerExit2D(Collider2D c)
 {
     if (c.gameObject.name == "Mouse")
     {
         mainCamera.deleteDrawingOfScreen(drawBubble);
         drawBubble = null;
         target.GetComponent <playerController>().set_speed(o_speed);
     }
 }
 void drawKey()
 {
     if (playerScript.getKeyState() && keyDraw == null)
     {
         keyDraw = new DrawScreen("key1", textureKey, 30, false);
         cameraScript.addDrawingToScreen(keyDraw);
     }
     else if (!playerScript.getKeyState() && keyDraw != null)
     {
         cameraScript.deleteDrawingOfScreen(keyDraw);
         keyDraw = null;
     }
 }