is it possible to make a rainbow gui cycle script?

i was wondering if it was possible to make a gui go through all of the colors in the rainbow, but tween service only goes through 2 colors. is there any way this could be possible? if so, what event/function would i use?

It is incredibly simple. You just need to wrap brickcolor.random() in a variable and return their Color3 value by using .Color.

For example, you have a rainbow script inside of a gui object:

local bcolor = BrickColor.Random() -- Get a random color
script.Parent.TextColor3 = bcolor.Color -- Set the gui object's color3 value to the random brickcolor's color3 value

You can wrap that inside a for loop, while loop, anything. You don't have to manually write the cycle yourself by using this. This works with ANY object with color3 value, not only gui objects.