//// Example 1, plug in the test.
//#include <Stepper.h>
//const int stepsPerRevolution = 2038; // the number of steps in one revolution of your motor (28BYJ-48)
//// initialize the stepper library on pins 8 through 11:
//Stepper myStepper(stepsPerRevolution, 8, 10, 9, 11);
//void setup() {
//  // set the speed
//  myStepper.setSpeed(5);
//  // initialize the serial port:
//  Serial.begin(9600);
//}
//void loop() {
//  // step one revolution  in one direction:
//  Serial.println("clockwise");
//  myStepper.step(stepsPerRevolution);
//  delay(500);
//  // step one revolution in the other direction:
//  Serial.println("counterclockwise");
//  myStepper.step(-stepsPerRevolution);
//  delay(500);
//}