Addon for faster retopology (hopefully)

I have an addon idea for retopology and I'd like to share it with you. I was thinking it would be interesting if we can paint with different colors the face flow on the model and then faces are automatically generated. the face follows the paint lines that are in one color as opposed to another color. you can look at it as sculpting a head of a man and then do retopology, and then apply different colors to different face loops but backward; that is sculpt the head, do the painting of where the face loop would be and then they would be generated. I attached an image I found online, It should explain what I am trying to convey, if you look at it as it's been made with this order: sculpt head - paint the face loops - generate the new topology. I hope I managed to convey the idea, English is not my first language.