Hey, I'm making an animation and I need some help with syncing it.

What needs to happen is this; it starts spinning slowly, and accellerates for a while untill it is going at a certain speed, and then it starts slowing down, and comes to a stop.

This is the expression I have so far:
if (frame < 102)
group4.rotateX = (frame*frame)*0.15;

Where do I go from here??

EDIT: Never mind, I've done it
:banana: