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    ledPin4 == HIGH? Guess you mean something else. Commented Aug 18, 2016 at 6:25
  • Also, currentMillis = onTime * 100; makes little sense. What did you actually mean? Commented Aug 18, 2016 at 6:29
  • @EdgarBonet I put it in there so if the LED was HIGH and there button pushed it would end the timer in the while loop Commented Aug 18, 2016 at 6:30
  • @MikaelPatel I set the LED to HIGH and then used an if statement to check if it's HIGH and the button was pressed at the same time. I didn't use there == to assign the HIGH state Commented Aug 18, 2016 at 6:33
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    Then you mean currentMillis = previousMillis + onTime, but that won't work because you assign currentMillis = millis(); right after. Instead, you can simply break out of the while loop. Commented Aug 18, 2016 at 6:52