Rainbow effect on sprite

I made a bar sprite and I want to find out how I can change its color (like a rainbow effect) when it's clicked.

Good morning :)

Are we talking about an actual animated rainbow effect where the colors pulsate through a range?
Or are you only after a color changing effect?

Similar to this hover effect?

:embed https://microstudio.io/TinkerSmith/spritebuttons/

Link

There are other examples, but somehow they don't show up in the Explore section anymore?
Even with search?

Otherwise, got any screenshots or links to show what you try to achieve?

Live Long and Tinker