I am fairly new to lightwave but desperatly need a few expressions in my layout scene for my assignment.

I am going to have an engine with its cam cogs spinning and was wondering what expression to use so they are repeatedly rotating through out my 1 min video.

Also i am trying to sus out parenting my model car to my roller coaster track and was wondering when its done if there was an expression for the car to constantly move around the track.

Many thanks