Alright here's my problem. I have an arduino uno that I just bought and I need to have a sequence of five LED's turn on with a press of a button (first press turns on first LED, second turns on the second LED, etc). However, I also need to put in a time control where after I press the button to turn on the first LED, a timer begins to count down from one minute twenty seconds. After the time gets to one minute, I need the LED's to remain in their current state whether it be on or off, and then after an additional twenty seconds they turn off. So far, I have the LED's working, but I've spent hours trying to find some way to start a countdown with no progress whatsoever
. Please help.