"Move to path"

My english is bad. But. :)

I need to create an object, which is able to move on the line or curve.

Is there any function for this, or do

I have to do this by myself? It's about an existing or created line or curve and I would like to say object to move on this line.

How exactly is the path to follow, you can use waypoint and lerp to them. if it's a simple sine, there's the sine behaviour which you could try out, try adding more than 1 to see the effects, 1 vertical and 1 horizontal for example