const int buttonPin=4;
const int ledPin=5;
int buttonState=0;
void setup()
Serial.begin(115200);
pinMode(buttonPin,INPUT);
pinMode(ledPin,OUTPUT);

void loop()
{
  buttonState=digitalRead(buttonPin);
  Serial.println(buttonState);
  if(buttonState==HIGH)
  {
    digitalWrite(ledPin, HIGH);
  }
  else{
    digitalWrite(ledPin, LOW);
  }
}