http://en.wikipedia.org/wiki/Stepper_motor
#include <AccelStepper.h>

#define HALFSTEP 8       // To know about HalfStep Stepper Motor plzz check the above mentioned link

// Motor pin definitions
#define motorPin1  8     // IN1 on the ULN2003 driver 1
#define motorPin2  9     // IN2 on the ULN2003 driver 1
#define motorPin3  10    // IN3 on the ULN2003 driver 1
#define motorPin4  11    // IN4 on the ULN2003 driver 1

#define switchPin 7      // Input signal from the switch whether ON or OFF
                      
// Initialize construtor with pin sequence IN1-IN3-IN2-IN4 for using the AccelStepper with 28BYJ-48
AccelStepper stepper1(HALFSTEP, motorPin1, motorPin3, motorPin2, motorPin4);

void setup() {
  stepper1.setMaxSpeed(1000);
  stepper1.setAcceleration(1000);
  stepper1.setSpeed(1000);
  stepper1.moveTo(40960); // 4096*10 steps for 10 rotations in 28BYJ-48 – 5V Stepper Motor
  //I hope you all to adjut the direction again within 10 rotations.....if no plzz feel free to disconect and connect again the microcontroller
}//--(end setup )---

void loop() {
  if(digitalRead(switchPin) == HIGH)   //Quite simple as you can see
    stepper1.run();
}