I am using a 555 timer ic to control the time the LED's are illuminated for, ( i have sorted the timings) and have been given a NAND ic chip to switch between the two timers so that the green activates after the red. I am relatively new to electronics so do not know how to achieve this, i understand that you can use a NAND chip to create other logic gates but do not know which to create to achieve the results.
This project is being attempted on a breadboard, any help would be greatly appreciated!
Thanks!