#include <Stepper.h>

const int stepsPerRevolution = 200;  

Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

int preValue=0;

void setup() {
  myStepper.setSpeed(50);
  pinMode(A0, INPUT);
  Serial.begin(9600);
}

void loop() {
  int potential_value=analogRead(A0);
  int value=map(potential_value,0,1023,0,200);
  
  Serial.println(value);
  myStepper.step(value-preValue);
  preValue=value;
}