Hi, I've not too much experience with electronics (it's a while since I did any study at Uni). I'm looking to make a simple LED circuit to run on 12v max. The circuit will light 32 LEDs one at a time until all are lit, then when switch is opened the LEDs go off one at a time until all are off. I've looked at 555/4017 chip circuits but can't figure out how to change a standard sequencing circuit to meet me need. Any help would be much appreciated, thanks.