void setup() {
  // put your setup code here, to run once:
  pinMode(8, INPUT); //sensor
  pinMode(12, OUTPUT); // led
}

void loop() {
  // put your main code here, to run repeatedly:
  int x = digitalRead(8);
  if (x == 1) {
    digitalWrite(12, HIGH);
  }

  else {
    digitalWrite(12, LOW);
  }
}