My Arduino

#include <Stepper.h>

const int sensorpin = A0;

int stepsturn = 485;
int fullturn = 1479;

int closest = 0;
int x = 0;
int steps = 0;

Stepper myStepper1(200,12,11);
Stepper myStepper2(200,4,3);

int i = 0;
int q = 0;
int z = 0;

void setup()
{
  pinMode(sensorpin,INPUT);
  myStepper1.setSpeed(150);//left
  myStepper2.setSpeed(150);//right
  analogReference(EXTERNAL);
}
void loop()
{
  i=0;
  q=0;
  z=0;

  while (i<fullturn){
    myStepper1.step(1);
    myStepper2.step(1);
    x = analogRead(sensorpin);
    i=i+1;
    if(x>closest){
      closest=x;
      steps = i;}
    x = 0;
    delay(5);
  }

  while(z<steps){
    myStepper1.step(1);
    myStepper2.step(1);
    z++;}

 while(analogRead(sensorpin)<950){
  myStepper1.step(1);
  myStepper2.step(-1); }
 }