int Led=7;
int button=2;

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

void loop() {
  // put your main code here, to run repeatedly:
int buttonstate= digitalRead(button);

if buttonstate == HIGH {
  digitalWrite(Led, LOW);
  else {
    digitalWrite(HIGH);
  }
}
}