AccelStepper with 28BYJ-48 follow POT example

//For a 28BYJ-48 stepper with ULN2003 driver combo
//Stepper follows POT position

#include <AccelStepper.h>
#define STEPS 2038 // the number of steps in one revolution of your motor (28BYJ-48)
#define LED LED_BUILTIN
#define LED1 2
#define POT A0
bool led1State = 0, update = 0;
int steps = 0, lastPos, count = 0;
long prevTime = 0;
AccelStepper stepper(AccelStepper::FULL4WIRE, 8, 10, 9, 11);

void setup() {
  analogReference(EXTERNAL);
  Serial.begin(9600);
  pinMode(LED, OUTPUT);
  digitalWrite(LED, HIGH);
  pinMode(LED1, OUTPUT);
  digitalWrite(LED1, led1State);
  //stepper.setMaxSpeed(1000);
  int val = analogRead(POT);
  val = getVal(val);
  lastPos = map(val, 0, 1023, 0, 2038);
  digitalWrite(LED, LOW);
}

int getVal(int x){
    if(x <= 30){
      x = 0;
    }else if( x >= 1020){
      x = 1023;
    }
    return x;
}

void loop() {

    if(millis() - prevTime >= 250){
      count++;
      if(count >= 20){
        int val = analogRead(POT);
        val = getVal(val);
        Serial.println((String)"POT Val: " + val);
        int currentPos = map(val, 0, 1023, 0, 2038);
        steps = currentPos - lastPos;
            if(currentPos != lastPos){
                stepper.enableOutputs();
                stepper.moveTo(currentPos);
                stepper.setMaxSpeed(150);
                stepper.setAcceleration(50);
                digitalWrite(LED, HIGH);
                Serial.println((String)"Steps to new position: " + steps);
                Serial.println((String)"Moving to new position!!" + currentPos);
            }
            count = 0;
            lastPos = currentPos;
            Serial.println((String)"Last Position: " + lastPos + "\n\n");
      }
      digitalWrite(LED1, (led1State = !led1State));
      prevTime = millis();
    }
    if (stepper.distanceToGo() == 0){
        stepper.disableOutputs();
        digitalWrite(LED, LOW);
    }
    stepper.run();
}