How do I animate a conveyor belt?

So I’m trying to animate a conveyor belt. Basically I need it to just cycle through lines of a conveyor belt. I tried modelling an actual conveyor belt, but then I couldn’t find out how to animate it. I’m trying to just make a big plain and make it go across the screen, but its too small to go on for 2 to 3 minutes.(the length of the animation it is in) Do any of you know a way to make an infinite loop of animation, or just a way to do something like this? Thanks in advance!

you could try looking for some of the tank tread tutorials

there are quite a few

as for the cycle - you just need the start to match up with the end and it could be however many frames you need