Change BG Color every 2 seconds with Timer and For Blocks

Im trying to change the BG color every 2 seconds with the Timer and/or For Each block but Im having trouble. I need this functionality for a couple different functions in my app.

Right now, I have a list of 3 colors: Red, Green, Blue. I have a clock enabled

Clock.Timer

   For Each 'item' in Color List

      set Button.TextColor= 'item'

But it seems to only show the last item of the list (color Blue) as the ButtonTextColor. Any help?

you could do it with an if else statement in the Clock.Timer event

if color = red

then set color to green

else if color = green

then set color to blue

else set color to red