How to add a LED to be triggered for 5 seconds without blocking any other code

Projects Programming
7

Am I right in assuming that you did not write the code in post #1 ?
This is an example from it of testing a button:

if ((digitalRead(Stop1) == LOW))
{
    // act on a button press . Button is high side so LOW is pressed and HIGH is not pressed
    // here you set the timer and switch the led on.
}