Create a void function in Arduino that will be used for runStepperMotor. It must run for 5 revolutions and go back to its original position, but if the ultrasonic detects a presence, it should stop immediately reverse the stepper motor to its original position.

void runStepperMotor() {
  // run for 5 revolutions
  delay(5000);
  // stop immediately if ultrasonic detects a presence
  // reverse the stepper motor to its original position
  delay(5000);
}