const int bittonPin = 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);
  }
}