Before you used noise-function to generate nice smooth values for forexample coordinates. Let’s do something similar with sine-function for scaling objects.
Sine-function fluctuates nicely between -1 and 1. If we call
sin(x) and move x a little bit on each frame, we get values that alternate between -1 an 1. Add + 1 to that value and we get values between 0-2 for the scale: