Simple IR led project using Arduino uno

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CODE :

void setup()

{

  pinMode(13,OUTPUT);

  pinMode(3,INPUT);

  Serial.begin(9600);

}

void loop()

{

  if (digitalRead(3)== LOW)

  {

    digitalWrite(13,HIGH);

    

    delay(5000);

  }

  else 

  {

    

    digitalWrite(13,LOW);

    delay(10);

    

  }

  

}