@ jokes_finder,
Don't get mad but actually I was just thrown off a little because I didn't take enough time to examine the circuit carelfully and I am so accustomed to people who use Fritzing using DIFFERENT COLORS for different signals it caught me off guard when the OP used the same color FOR both the signal AND the power for each of the three colors so you could see which led those lines were related to. Personally, I would have limited that three color scheme to the PWM control signals and use red for the Mosfet Drain and black for the mosfet Source. I don't like the OP's Fritzing because it makes it look like the gates are all shorted to ground and the sources all have a resistor in series. If that were true it would be correct for the resistors but wrong for the gates so I don't know what the hell he's doing there but the illustration is confusing.
Have you heard of the WS2803 ? (SEE ATTACHED)
@OP,
Please draw a correct schematic with pen & paper and take a photo with a cell phone and post it. This Fritzing sucks. I'm sure you didn't wire it the way it looks and I don't know what's going on there. Please post a real schematic.
WS2803-preliminary-En.pdf (437 KB)