stepper driver

#include <LiquidCrystal.h>

#define SPEED 800

const int dir = 8, step = 9, ms1 = 10, ms2 = 11, ms3 = 12;
const int SetBotton = 13, IncBotton = 14, DecBotton = 15;
const int rs = 2, en = 3, d4 = 4, d5 = 5, d6 = 6, d7 = 7;

float position = 0, minMove = 45;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {

 // put your setup code here, to run once:
 pinMode(SetBotton, INPUT);
 pinMode(IncBotton, INPUT);
 pinMode(DecBotton, INPUT);

 pinMode(dir, OUTPUT);
 pinMode(step, OUTPUT);
 pinMode(ms1, OUTPUT);
 pinMode(ms2, OUTPUT);
 pinMode(ms3, OUTPUT);

 digitalWrite(ms1, LOW);
 digitalWrite(ms2, HIGH);
 digitalWrite(ms3, LOW);

 lcd.begin(16, 2);
 lcd.print("PROTORAPID      ");
 lcd.setCursor(0, 2);
 lcd.print("Modulo 1801     ");
 delay(2000);
 lcd.clear();
 lcd.print("POSIZIONE:      ");
 lcd.setCursor(0, 2);
 lcd.print(position, 2);
 lcd.setCursor(11, 2);
 lcd.print("gradi");
}

void loop() {

  // put your main code here, to run repeatedly:
  if(digitalRead(IncBotton) == HIGH) {
    delay(150);
    stepperMove(dir, step, int(minMove / 0.45), 1);
    if(position != 360 && position + minMove <= 360) {
      position += minMove;
    }
    else if(position + minMove > 360) {
      position = abs(360 - (position + minMove));
    }
    else{
      position = 0;
      position += minMove;
      }
    lcd.setCursor(0, 2);
    lcd.print("           gradi");
    lcd.setCursor(0, 2);
    lcd.print(position, 2);
    }

  else if(digitalRead(SetBotton) == HIGH) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("      Menu      ");
    delay(1000);
    lcd.clear();
    lcd.print("SPOSTAMENTO MIN:");
    lcd.setCursor(0, 2);
    lcd.print(minMove, 2);
    lcd.setCursor(11, 2);
    lcd.print("gradi");
    while(1) {
      if(digitalRead(IncBotton) == HIGH) {
        delay(150);
        minMove += 0.45;
        lcd.setCursor(0, 2);
        lcd.print("           gradi");
        lcd.setCursor(0, 2);
        lcd.print(minMove, 2);
      }
      else if(digitalRead(SetBotton) == HIGH) {
        delay(300);
        break;
      }
      else if(digitalRead(DecBotton) == HIGH) {
        delay(150);
        if(minMove - 0.45 >= 0.45) {
          minMove -= 0.45;
        }
        lcd.setCursor(0, 2);
        lcd.print("           gradi");
        lcd.setCursor(0, 2);
        lcd.print(minMove, 2);
      }
    }
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("POSIZIONE:      ");
    lcd.setCursor(0, 2);
    lcd.print(position, 2);
    lcd.setCursor(11, 2);
    lcd.print("gradi");
    }

  else if(digitalRead(DecBotton) == HIGH) {
    delay(150);
    stepperMove(dir, step, int(minMove / 0.45), 0);
    if(position != 0 && position - minMove >= 0) {
      position -= minMove;
    }
    else if(position - minMove < 0) {
      position = 360 + (position - minMove);
      }
    else{
      position = 360;
      position -= minMove;
      }
    lcd.setCursor(0, 2);
    lcd.print("           gradi");
    lcd.setCursor(0, 2);
    lcd.print(position, 2);
    }
}

void stepperMove(byte dirPin, byte stepPin, unsigned int step, bool direction) {

  if(direction == 0) {
    digitalWrite(dirPin, HIGH);
    }else{
      digitalWrite(dirPin, LOW);
      }

  for(int counter = 0; counter != step; counter++) {
    digitalWrite(stepPin, HIGH);
    delayMicroseconds(SPEED);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(SPEED);
    }
}