Instance Rotation over Lifetime I want to have instances rotate randomly over time, seems an easy thing to code, how about it?

I'm trying to make a sparkly / glittery surface to render and wrap around a human face model, or maybe just have instances of glitter rotate on the surface of that model.
You can use modifiers for it in the graph editor tab.
https://docs.blender.org/manual/en/latest/editors/graph_editor/fcurves/modifiers.html