Hi,   I want to follow a sprite with another, but when the first sprite move quickly, the second is shifted. It is visible on the screen and in the logs (x/y position in each iteration of the update function).   When the first sprite slow down, the shift is reduced. When it stop, the sprite are at the same position (it’s normal).   How to do the positions of the two elements remain the same every time?   I have make a live example here : http://jsbin.com/kipayexoqadu/4/edit?js,output Lose focus