# cyan
cmykFill(1, 0, 0, 0)
rect(0, 0, 250, 1000)
# magenta
cmykFill(0, 1, 0, 0)
rect(250, 0, 250, 1000)
# yellow
cmykFill(0, 0, 1, 0)
rect(500, 0, 250, 1000)
# black
cmykFill(0, 0, 0, 1)
rect(750, 0, 250, 1000)