const int controlPin1 = 2;
const int controlPin2 = 3;
const int enablePin = 9;
const int directionSwitchPin = 4;
const int onOffSwitchStateSwitchPin = 6;
const int potPin = A0;

int onOffSwitchState = 0;
int previousOnOffSwitchState = 0;
int directionSwitchState = 0;
int previousDirectionSwitchState = 0;

int motorEnabled = 0;
int motorSpeed = 0;
int motorDirection = 1;

void setup()
{
pinMode (potPin, INPUT);
pinMode (directionSwitchPin, INPUT);
pinMode (onOffSwitchStateSwitchPin, INPUT);
pinMode (controlPin1, OUTPUT);
pinMode (controlPin2, OUTPUT);
pinMode (enablePin, OUTPUT);
Serial.begin (9600);

digitalWrite (enablePin, LOW);

}

void loop()
{
  onOffSwitchState = digitalRead (onOffSwitchStateSwitchPin);
  delay (1);
  directionSwitchState = digitalRead (directionSwitchPin);
  Serial.println (directionSwitchState);
  motorSpeed= analogRead (potPin);

  motorSpeed= map (motorSpeed, 0, 1023, 0, 255);
  motorSpeed = constrain (motorSpeed, 0, 255);

  if (onOffSwitchState != previousOnOffSwitchState) {
    if (onOffSwitchState == HIGH) {
      motorEnabled = !motorEnabled;
    }
  }

    if (directionSwitchState != previousDirectionSwitchState) {
      if (directionSwitchState == HIGH) {
        motorDirection = !motorDirection;
      }
    }
    if (motorDirection == 1) {
      digitalWrite (controlPin1, HIGH);
      digitalWrite (controlPin2, LOW);
    }

    else {
      digitalWrite (controlPin1, LOW);
      digitalWrite (controlPin2, HIGH);
      }
 if (motorDirection == 1) {
  analogWrite (enablePin, motorSpeed);
 }
 else {
  analogWrite (enablePin, 0);
 }
 previousDirectionSwitchState=
 directionSwitchState;
 previousOnOffSwitchState = onOffSwitchState;
}