change the line color frequently

[FaceLess_]

how do i change the color line frequently in every 1 min

[Dark Photon]

how do i change the color line frequently in every 1 min
There are lots of ways. Why do you ask?

And why 1 min? That's ~3600 frames (or more depending on vsync, and whether you've got sync-to-vblank on). Is this the clock homework?