Arduino Elevator

arduinoelevator.c

#include <Servo.h>
#include <Stepper.h>
Servo myservo; 
int pos = 0; 

#define STEPS 100

const int buttonPin =17;
Stepper stepper(STEPS, 8, 9, 10, 11);
int previous = 0;

int buttonState = 0;

void setup() {

   myservo.attach(44);
   pinMode(buttonPin, INPUT); 
  Serial.begin(9600);
  pinMode(22, OUTPUT); 
  pinMode(23, OUTPUT);
  pinMode(24, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(26, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(28, OUTPUT);
  pinMode(29, OUTPUT);
  stepper.setSpeed(30);
  
  digitalWrite(29, 0);  // start with the "dot" off
}


void loop() {
  
  int sensorValue = analogRead(A0);
 
 buttonState = digitalRead(buttonPin);
   
    if (buttonState == HIGH){     
    // turn LED on:    
    myservo.write(90);  
  } 
  else {
    // turn LED off:
     myservo.write(0);  
  }

  
  Serial.println(sensorValue);
  

  // 1
  if( sensorValue >= 0 &&  sensorValue <= 255)
    {   
     
   
    
  
 digitalWrite(22, 0);
 digitalWrite(23, 1);
 digitalWrite(24, 1);
 digitalWrite(25, 0);
 digitalWrite(26, 0);
 digitalWrite(27, 0);
 digitalWrite(28, 0);
 
           
                     

  }
   //2
   if(sensorValue >=255 &&  sensorValue <=512)
    {
      
    
  digitalWrite(22, 1);
  digitalWrite(23, 1);
  digitalWrite(24, 0);
  digitalWrite(25, 1);
  digitalWrite(26, 1);
  digitalWrite(27, 0);
  digitalWrite(28, 1);
  
 
  }
    //3
   if(sensorValue >=512 &&  sensorValue <=767){
      
  digitalWrite(22, 1);
 digitalWrite(23, 1);
 digitalWrite(24, 1);
 digitalWrite(25, 1);
 digitalWrite(26, 0);
 digitalWrite(27, 0);
 digitalWrite(28, 1);
    
  }
    //4
   if(sensorValue>767){
     
  digitalWrite(22, 0);
 digitalWrite(23, 1);
 digitalWrite(24, 1);
 digitalWrite(25, 0);
 digitalWrite(26, 0);
 digitalWrite(27, 1);
 digitalWrite(28, 1);
    
  }
  
    delay(100);
  
}