// Defines pins numbers
const int stepPin = 9;
const int dirPin = 8;
const int enablePin = 10; 
int customDelay; // Defines variables
int intervalBetweenSteps = 200;
 
void setup() {
  // Sets the three pins as Outputs
  pinMode(stepPin,OUTPUT);
  pinMode(dirPin,OUTPUT);
  pinMode(enablePin,OUTPUT);
 
  digitalWrite(dirPin,HIGH); //Enables the motor to move in a particular direction
  digitalWrite(enablePin,LOW); //Enables motor
}
void loop() {
 
  intervalBetweenSteps = speedUp(); // Gets custom delay values from the custom speedUp function
  // Makes pulse with custom delay, depending on the Potentiometer, from which the speed of the motor depends
  digitalWrite(stepPin, HIGH);
  delayMicroseconds(intervalBetweenSteps); // this is the pulse width
  digitalWrite(stepPin, LOW);
  delayMicroseconds(intervalBetweenSteps);
}
// Function for reading the Potentiometer
int speedUp() {
  int customDelay = analogRead(A0); // Reads the potentiometer
  if (customDelay > 1020) {
    digitalWrite(enablePin, HIGH); //disables the motor
  }
  else {
    digitalWrite(enablePin, LOW); //enables to motor
  }
  int newCustom = map(customDelay, 0, 1020, 200,12000); // Converts the read values of the potentiometer from 0 to 1023 into desired delay values
  return newCustom;  
}