int potValue;
int desiredValue = 512;
int desiredValuePWM;

void setup() {

Serial.begin(9600);
Serial.println("BEGIN");
Serial.println();

pinMode(5, OUTPUT); // violet
pinMode(6, OUTPUT); // red

}

void loop() {
potValue = analogRead(A0);

  if (desiredValue < potValue) {
    desiredValue++;
  }
  if (desiredValue > potValue) {
    desiredValue--;
  }
  delay(5);

if (desiredValue > 512) {
  desiredValuePWM = map((desiredValue), 512, 1023, 0, 255);
  analogWrite(5, desiredValuePWM);
}
if (desiredValue < 512) {
  desiredValuePWM = map((desiredValue), 512, 0, 0, 255);
  analogWrite(6, desiredValuePWM);
}

Serial.print("Pot value: ");
Serial.print(analogRead(A0));
Serial.print(", PWM value: ");
Serial.println(desiredValuePWM);
} // loop end