const byte buttonPin = 16; // the number of the pushbutton pin
const byte ledPin = 32; // the number of the LED pin
// variable for storing the pushbutton status
int buttonState = 0;

void setup() 
{
Serial.begin(115200);
// initialize the pushbutton pin as an input
pinMode(buttonPin, INPUT_PULLUP);
// initialize the LED pin as an output
pinMode(ledPin, OUTPUT);
}

void loop() 
{
// read the state of the pushbutton value
buttonState = digitalRead(buttonPin);
Serial.println(buttonState);
// check if the pushbutton is pressed.
//If it is, the buttonState is HIGH
if (buttonState == HIGH) 
{
  // turn LED off
  digitalWrite(ledPin, LOW);
}
else
{
// turn LED on
digitalWrite(ledPin, HIGH);
}
}