It points to 0,0 (top, left corner) of the layout. That happens if you use touch.x touch.y without a condition. So, if there is no touch event the x and y values will be 0. I think this happens because auf event 6. You disabled the condition but not the action. So every tick the turret rotate to touch.xy and this ist 0,0 if you don't touch the display or click the mouse.