I haven't done VB for a while, but this is a fairly simpel way to do it
I'm going to call:
The buttons you click by the colours they are.
The choices (at the bottom) "C1", "C2", "C3" and "C4"
The variable "selector" will represent what choice you are on
Put this in the different color buttons.
code:
"C" & selector.backcolor="&H80000007&"
If selector =< 4 then
selector = selector + 1
end if