void setup() {

  // put your setup code here, to run once:

  pinMode(A0, INPUT);

  pinMode(2, INPUT);

  pinMode(8, OUTPUT);

}

 

void loop() {

  // put your main code here, to run repeatedly:

  if (digitalRead(A0) == 1)

  {

    digitalWrite(8, HIGH);

    for (int i=0;i<5000;i++)

    {

      delay(1);

      if (digitalRead(2) == 1) break;

    }

  }

 

  if (digitalRead(2) == 1)

    digitalWrite(8, LOW);

}