How would I model this?

[Gully_Foyle]

See also this previous discussion:

How do I create a disk with a wavy top

I’m still new to Sketchup, so I need some help from someone more experienced. What I want to do is to create a disk 60 mm in diameter and 15 mm thick. That part is easy. What I then want is to make one of the surfaces wavy. Imagine dividing the disk surface into 4 quadrants and imposing a sine wave on it such that there is a peak every 90 degrees. I want to height from valley to peak to be 5 mm. Why do I want this part? I am working on an idea to make a cam system. I will attach the disk to a v…

-Gully