const int ledPin =13;
const int buttonPin=4;
int buttonState;
void setup() 
{
 // put your setup code here, to run once:
 pinMode(ledPin,OUTPUT);
 pinMode(buttonPin,INPUT);

}

void loop() 
{
  // put your main code here, to run repeatedly:

  buttonState = digitalRead(buttonPin);
  if(buttonState == LOW)
  {
    digitalWrite(ledPin,HIGH);
    delay(5000);
    digitalWrite(ledPin,LOW);
    delay(5000);

  }
  else
  digitalWrite(ledPin, LOW);


}