Looking for Arduino project using 3 light sensors when the sensors are shined on with a laser in the correct order a green led will turn on for 5 seconds and trigger a relay. If the wrong order is done a red light flashes for 10 seconds then it resets. please help me in its coding or any suggestion.
Post a link to the laser devices and the sensors and say what Arduino you are using.
In principle, it is simple to detect events such as a sensor registering laser light and taking some action.
Lighting green/red leds, flashing these etc. is also straightforward.
I guess this is a school exercise, so you should expect to have show some problem solving initiative yourself like presenting some code that you have developed.