Stepper motor control using Arduino and L293

Components
IC1	L293D
B1	5v DC supply
SW1,SW2	N.O. Push Button
R1,R2,R3,R4	100 omhs   1/4W
R5.R6	10k ohms 1/4W
D1,D2,D3,D4	LED
CN1	To pin13 (digital pin)	ARDUINO
CN2	To pin12 (digital pin)
CN3	To pin11 (digital pin)
CN4	To pin10 (digital pin)
CN5	To Stepper motor(4 wire)	MOTOR
CN6	To pin2 (digital pin)	ARDUINO
CN7	To pin3 (digital pin)
CN8	To A0(analog pin)
CN9	To Ground pin
CN10	To 5v pin

There are 2 push buttons, one is for CW rotation and the other is for reverse.

Potentiometer is used to control the speed of the motor. Minimum speed is 0 and 100 for the maximum. If the speed is 0 the motor will not rotate even the push button is pressed. If the two push buttons were pressed the motor will not rotate as well. 

Codes:

#include <Stepper.h>

int forward = 2;

int reverse = 3;

Stepper motor(200, 10,11,12,13);            

void setup() {

  pinMode(forward,INPUT);

  pinMode(reverse,INPUT);

    Serial.begin(9600);

}

void loop() {

  int Speed = analogRead(A0);

  int RPM = map(Speed, 0, 1023, 0, 100);

  int f = digitalRead(forward);

  int r = digitalRead(reverse);

  if(f == 1 && r == 0 && RPM > 1){

  motor.step(1);

    motor.setSpeed(RPM);

    delay(.01);

  }

  if(r == 1 && f== 0  && RPM > 1){

    motor.step(-1);

    motor.setSpeed(RPM);

        delay(.01);

  }

  delay(5);

    Serial.println(RPM);

}