You can control the RGB pixel values buy setting the last three digits of your dust. 0-255 Satoshi (.00000000)
Click on a pixel and it will give you the address and QR codes for the RGB values of the pixel.
It scans the blockchain for marked addresses and updates the feed real time. Cost about $0.02 per update. Running on Bcash Right now as the fees are so cheap.
https://dsp496.github.io/PixelWars/