// define motor according to pin diagram
int motor = D3;

void setup() {
  // initialize motor as an output
  pinMode(motor, OUTPUT);
}

void loop() {
  digitalWrite(motor, HIGH);   // turn the LED on 
  delay(1000);               // wait for a second
  digitalWrite(motor, LOW);    // turn the LED off
  delay(1000);               // wait for a second
}