int buttonState=0;


const int buttonPin= 7;
const int ledPin = 3;

void setup() {
  // put your setup code here, to run once:
pinMode(ledPin,OUTPUT);
pinMode(buttonPin, INPUT);
}

void loop() {
  buttonState=digitalRead(buttonPin)

  if (buttonState==LOW){
    digitalWrite(ledPin, HIGH);
    } else {
      digitalWrite(ledPin, LOW)}

}