int buttonPin = 7;
int ledPin =  6;
int buttonState = 0;

void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() 
{
  buttonState = digitalRead(buttonPin);

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