int buttonState=0;

void setup(){
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);
  
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);

}

void loop(){
  buttonState=digitalRead(2);
   if (buttonState==HIGH){
    digitalWrite(13, LOW);

   }else{
    digitalWrite(13, HIGH);
   }
  buttonState=digitalRead(3);
  if(buttonState==HIGH){
    digitalWrite(12, LOW);
  }else{
    digitalWrite(12, HIGH);
  }

  buttonState=digitalRead(4);
   if (buttonState==HIGH){
    digitalWrite(11, LOW);

   }else{
    digitalWrite(11, HIGH);
   }
   
}//3 botões - input_pullup 3 leds , cada botão ligará um lad.