I have an NXT but I don’t know how to make it detect colors, all it does is say “wait”. My set includes a light sensor but I heard some YouTube videos say there was a lego “color” sensor. Does LEGO sell this? Can some one tell me how to get it please?
Lego has made colour sensors for various robotics themes, including Boost, EV3, and NXT. NXT is pretty old so you'll need to head to a 3rd party website like Bricklink to buy one.