Btw, I should have said that the WIFI is only there as something that BRAY can go through that is still destroyable. It does not actually transmit or recieve anything.
This is really clever. There's an issue in that the photons can theoretically miss the receiver completely, which you could fix either by using more PHOT emitters (either layered more, or multiple sources) or by expanding the detection range. Also, it relies on line-of-sight, but this is easily overcome using relays, reflectors or gravitational lensing. Awesome creation! +1
There is a layered PHOT emitter that sends PHOT through a QRTZ pixel, making it go outwards in a circle. The recievers detect the PHOT, and set the colour of FILT to the colour of the PHOT. The FILT is in XOR mode, so will only allow BRAY of that exact colour though. 3 different BRAY signals are sent through the FILT, and each one will toggle a different light if it gets through.