/client/verb/call_one_of_these()
	switch(input("What do you want to do?") as null|anything in list("Identity","Rotation","Brightness","Contrast","Saturation"))
		if("Rotation")
			color = color_rotation(input("How many degrees?") as num)
		if("Brightness")
			color = color_brightness(input("How bright?") as num)
		if("Contrast")
			color = color_contrast(input("How much contrast?") as num)
		if("Saturation")
			color = color_saturation(input("How saturated?") as num)
		else
			color = null