have it zoom in and out once in a while Acceleration/Deceleration

edit

have the color pallete change over time Gradient shift

edit

have the color pallete change over time Palette cycling

edit

have it zoom in and out once in a while Random intervals

edit

edit

edit

have it zoom in and out once in a while Ease-in-out

edit

edit

have it zoom in and out once in a while Random Intervals

edit