Yes, it`s better but that`s not it 100%. I see 2 problems here. First, movement of green object (_x) stops in first frame when it starts with animation. Second, movement in "end" frame doesn`t work at all. Green object should continue to move by key.RIGHT in ''end'' frame, continue to move in right (+) direction. In first frame, it moves in wrong (-) direction and that`s ok. In any case, thanks for help. If you find out even more better solution, it would be great.