Hi guys

I have a simple animation of a sphere bouncing abound inside an object and i want the animation to loop.

Simple yeah, Post infinity cycle on bam!!, but i want to be able to speed up the cycle after that.

Is there a way to smoothly increase the speed(or decrease the frames) so it looks like it gradually speeds up to light speed

I tried copying the frames and compressing them in the time slider but that started causing issues with half and fractions of frames becoming key framed and the animation looking very stepped.(After every cycle it would speed up)

So any help on this would be really appreciated.