Is it your intent to have the entire
cyc change from Red to Yellow to green to gold ( and so on - it's been a while since I did the show and I don't remember it all) -OR- do you want to show all of the colors at once?
If the former - the standard answer would be to use Red, Blue, Green ( or Red, Blue, Green, Amber) and mix them to get whatever color you want.
If the later, I would suggest that you don't want to use the far cycs. The far cycs are designed to spread evenly and blend with the adjacent fixtures. If you want a lot of stripes of color on the
cyc, this is probably not how to do it. ( and you probably want to use the far cycs to get color washes on the
cyc at other times anyway)
Some possibilities:
Place some lekos, fresnels, or
par units at the bottom ( or top) of the
cyc. One per color that
wash up the
cyc and give a clearly defined swath of light.
If you have some old
R40 strip lights ( or any kind of strip light that uses
PAR lamps) relamp the
unit with a spot, and use every second or third lamp with a different color.
Note that if you want multiple bands of color at the same time, you really are not mixing ( well - I guess if you have a Red light next to a Green, you would see Yellow between the two - but it probably would not be as distinct as you want).
Note that if you want the entire
cyc to change colors that you might have issues with
cue timing, or with being too distracting to the audience.
Good luck. with your design.