/*
  Forum: https://forum.arduino.cc/t/making-something-happen-only-once-when-a-button-is-held-down/1308686/2
  Wokwi: https://wokwi.com/projects/411030595132389377

*/

const int triggerPin = 2;  // button on pin 2
const int ledPin = 13; // led on pin 13
const int a = 150;  //delay time
bool triggerState = false;// variable for the state of the trigger

void setup() {
  pinMode(triggerPin, INPUT_PULLUP);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  if (!triggerState && digitalRead(triggerPin) == LOW) {
    triggerState = true;

    //led light
    digitalWrite(ledPin, HIGH);
    delay(a);
    digitalWrite(ledPin, LOW);
    delay(a);
    digitalWrite(ledPin, HIGH);
    delay(a);
    digitalWrite(ledPin, LOW);
    delay(a);
    digitalWrite(ledPin, HIGH);
    delay(a);
    triggerState = false;
  } else     digitalWrite(ledPin, LOW);
}