How to create a mechanism for changing an animal's eyes in response to hunger and satiety?

[GeorgeMorton11]

How to create a mechanism for changing an animal's eyes in response to hunger and satiety? I thought of mTOR1 detection and further expression of the GFP genes that we'll theoretically integrate into model animals eyes. How do I detect activation or inhibition of mTORC1? With the help of which receptors? It is clear that it changes its state depending on amino acid hunger/saturation, but how to send a command to the gene for GFP expression in response to this? How will the genes know when to stop? How can the already formed protein be destroyed after it stops being synthesized? is there anything you can put under the TFEB promoter, at least the same GFP protein with some kind of proteolytic site like TEV, so that it mows down the already formed GFP after saturation and sew the protease itself to a functional antagonist or something? Answer as fully as possible. Which specific receptors with names, which proteins, which promoters, the whole procedure is as complete as possible. Please! I need your help