Arduino-Controlled Kinetic Sculpture

const int A1A = 26; // PWM Speed
const int A1B = 27; // direction
int motorVal; // motor

// potentiometer pins
int potPin = 12;
int potVal;

// setting PWM properties
const int freq = 5000;
const int resolution = 8;

void setup() {
  pinMode(A1A, OUTPUT); // specify these pins as outputs
  pinMode(A1B, OUTPUT);

  pinMode(potPin, INPUT); // specify these pins as inputs

  ledcAttach(A1A, freq, resolution);
  ledcWrite(A1A, 0);   // start with the motors off 
}

void loop() {
  potVal = analogRead(potPin); // read pot value
  motorVal = map(potVal, 0, 4095, 0, 255); // map pot reading to 0-255 scale
  motorA(LOW, motorVal);  // turn motor CW depending on pot value
}


// This is a custom function to drive Motor A
// inputs: direction (HIGH/LOW), speed (0-255)
// outputs: motor control

void motorA(byte d, int s) {
  if(d == 1){
    ledcWrite(A1A, 255-s); 
    digitalWrite(A1B, HIGH); 
  } else if (d == 0){
    ledcWrite(A1A, s); 
    digitalWrite(A1B, LOW);
  }
}