int buttonPin=2;
int LEDPin=13;
void setup() {
  // put your setup code here, to run once:
  pinMode(LEDPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  digitalWrite(LEDPin,LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  int TimeC=0;
  //We wait when button is not being pressed as LED will be glowing during this time
  while(digitalRead(buttonPin)==LOW)
  {

  };

 //Adjusting for physical bounce of Push Button
  delay(20);



  while(digitalRead(buttonPin)==HIGH)
  {
    TimeC++;
    delay(1);
    //wait one millisecond
  }

  if(TimeC>0)
  {
    digitalWrite(LEDPin, HIGH);
    delay(TimeC);
    digitalWrite(LEDPin, LOW);
  }

  

}