Scratch

Hi,
I have been trying to make a catapult game in which you pull back this cup on a string with a rock in it, let it go, and try to hit a target. My problem? My problem is that when you let go of the cup, it needs to spring back to it's original location, rather quickly. Of course I could have it go there instantly but I think it would look better animated. So, I came up with this. -145 being the orriginal x position

repeat (-145 minus x position)
change x by 1
end repeat

That worked fine except for one thing: It was horribly slow.
So then I did this

repeat (-145 minus x position divided by 15)
change x by 15
end repeat

That would have worked but of course, unless they drag it back a multiple of 15, it will miss it's original location.

Any ideas? Thanks, Pip