const int BUTTON_PIN=7;
const int LED_PIN=8;
int buttonState=0;
void setup() {
  // put your setup code here, to run once:
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}
void loop() {
  // put your main code here, to run repeatedly:
  buttonState=digitalRead(BUTTON_PIN);
  if(buttonState==LOW)
    digitalWrite(LED_PIN, HIGH);
  else{
    digitalWrite(LED_PIN, LOW);
  }
}