const int motorPin = 9; // Digital pin connected to the transistor base (via a resistor)

void setup() {
  pinMode(motorPin, OUTPUT); // Set the motorPin as output
}

void loop() {
  digitalWrite(motorPin, HIGH); // Turn the motor ON
  delay(1000);                 // Wait for 1 second
  digitalWrite(motorPin, LOW);  // Turn the motor OFF
  delay(1000);                 // Wait for 1 second
}