In order to create lots of different products from a single media, we have designed a biological circuit that allows plants to change their metabolic pathway thanks to light stimulus. It is a two-steps optogenetically controlled cascade, activated with red or blue light. With this technology we can avoid using chemicals for changing the metabolic pathway and produce nearly anything we want in the cell, what is more, this can be virtually expanded to infinite, allowing the creation of several different compounds just with one machine. The chassis for the experiment are plants, but why plants? They need light to grow, so maybe they aren’t the best organism for optogenetics, aren’t they? In their primary growth steps, light is not needed, and, what is more, seeds are very resistant to unfavorable environments, so this allows us the creation of a gadget that keeps the seeds inside and which can be used in many different environments, from the dessert to the space. Just pressing a button, the gadget can be programmed to stimulate the plant with the correct sequence of light and with the enough intensity and time thanks to LEDs technology. We are trying to produce some small proteins such as interferon alpha, a rotavirus vaccine, a cholera vaccine and lactoferrin, compounds that can be useful in underdeveloped countries, but keep in mind that the range of possibilities is enormous.