Loopindex is the loop count, dunno if C3 has Repeat with it, but of course loops do.
Looks like it should be a little less than +333 for the offset.
I'm so sorry. I still don't understand. I put Loopindex on Repeat but nothing happens. Also, what is offset? Isn't it the distance I want to it to go? Like, I want it to go 333 pixels right. Something like that...