How do I 'bouncy' UI elements

In Stepmania, the UI elements 'bounce' as the come on the screen. You can see it in the first few secs of this video:

https://youtu.be/1XdEoIAc9wo

Is this pre-animated or built into the software?

How could I do that in C2?

Like this but with 2x the frames enjoy!!

http://www63.zippyshare.com/v/Ush4vEqv/file.html

Gotcha.. Pre-rendered.

Thank you!

Or you can do it smoother than that using the SIne behaviour, and it means you don't have to animate everything! Like this: http://mikelaraman.com/misc/bouncy%20with%20sine.capx

Or you can do it smoother than that using the SIne behaviour, and it means you don't have to animate everything! Like this: http://mikelaraman.com/misc/bouncy%20with%20sine.capx

Awesome find !! I never used sine for this just flying enemies.

bumpy examplewithout plugins in case you need it.

All of those look pretty static (well, I can't see the last one).

Is there no way to decay the spring motion?

Something more like this (I had to speed up the timescale so it would play properly):

http://www.trinitifx.com/wip/Start_Bounce.zip