Hi, thanks, I'm going to play around that solution. I have another issue, I think it's related (because of the timing), the problem is that the whole animation needs to be finished to start again. I'd like that each line move to left then right continuously, like a moving flag actually.    We can just focus on the first line, it goes to right then come back to left, what I'd like to achieve is that the line as soon as it came to the original point start straight away to re-animate (rig