does anyone know how to make a basic shader bitmap spin in a clockwise motion like a spinning wheel or a pinwheel? what values do i need to modify? how can i change direction and speed? (detailed info: im making a weapon tag with a "halo 4" like scope. (multiple layers overlayed over each other going different directions. i tried messing with shader chicagos but it ended up spazzing out like crazy.)

so if i set the 256x256 bitmap rotation center to the very middle of the bitmap it should rotate like a pinwheel? i tried that once... thats when it went and spazzed out and what variable functions should i use? one zero cosine slide spark jitter etc?

also whats a b c d out?