Hi, You add a position limiter node. Connect to the create dot from the start node and you change the code where it says (click on the pen top right corner of the node) In the update function: if(_max.x != null && pos.x > _max.x){ pos.x = _max.x; } to if(_max.x != null && pos.x > _max.x){ pos.x = _min.x; } this way when it reached the max position allowed ,it resets to the minimum position on the x axis (if your movement in on the y axis do that for pos.y) Combine with a Move node