Combining millis with button sensing

Projects Programming
3

arduino_new:
consider the following pseudo code:

I dont think I follow on this one.

I added some more to your example to try to understand it but I think it would reset "time_stamp=millis()" every time it loops?

I'm also not sure about when to set "time_stamp=0" without it looping continuously equal to 0

I'm new to programming so it could be a simple solution staring me in the face and I dont see it yet.

void loop() {
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH) {
    if (time_stamp == 0) {
      time_stamp = millis();
      digitalWrite(ledPin, HIGH);
    }
    else {
      digitalWrite(ledPin, LOW);
    }
  }
  else {
    digitalWrite(ledPin, LOW);
  }
}