prototype final project code

//www.elegoo.com
//2016.12.9

const int pinWater = 0;
int historyWaterLevel = 0;
char printBuffer[128];
int minimum= 0;
int maximum= 500;
int pourOnceTime = 2500 ;
int settleDelay =2000;
int waterInch=0;

#include <Stepper.h>

#include <LiquidCrystal.h>
LiquidCrystal lcd (4,5,15, 16, 17, 18);

const int pinButton= 2;
boolean ButtonPressed=0;
boolean prevButt=0;
boolean sensorOn= 0;
const int pinPot= A5;
int waterLevel;

const int pinLEDgreen= 12;
const int pinLEDred= 13;

const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution

// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8,9,10,11);

void setup()
{
  Serial.begin(9600);
  // set the speed at 20 rpm:
  myStepper.setSpeed(10);

  lcd.begin (16,2);
  Serial.begin(9600);
  pinMode (pinButton, INPUT);
  pinMode (pinPot, INPUT);
  pinMode (pinLEDgreen, OUTPUT);
  pinMode (pinLEDred, OUTPUT);
  lcd.clear();

}

void loop()
{
  lcd.clear();
  lcd.print("Place the bowl");
  delay(5000);
  lcd.clear();
  lcd.print("Press the button");
  while (!sensorOn)
  {
    Button();
  }
  lcd.clear();
  lcd.print("Bowl filler on");
  while(sensorOn)
  {
    waterLevel = analogRead(pinWater); // get adc waterLevel

      while ((waterLevel>= minimum) && (waterLevel<maximum) && sensorOn)
      {
         pourOnce(.25);
         waterLevel = analogRead(pinWater);
         delay(1000);
         lcd.clear();
         Button();
         lcd.print ("S0=");
         lcd.print (sensorOn);
         lcd.setCursor (0,1);
         lcd.print ("wL=");
         lcd.print (waterLevel);
      }
      if (waterLevel >= maximum)
      {
        digitalWrite(pinLEDgreen, HIGH);
        delay(1000);
        digitalWrite (pinLEDgreen,LOW);
      }
      Button();
  }

}

void pourOnce(float angle)
{
  int steps=angle*200;
  myStepper.step(steps);
  delay(pourOnceTime);
  myStepper.step(-steps);
  digitalWrite(pinLEDred, HIGH);
  delay(100);
  digitalWrite (pinLEDred, LOW);
  delay(settleDelay);
}


boolean debounce (boolean last)
{
  boolean current = digitalRead(pinButton);
  if (last != current)
  {
    delay(5);
    current= digitalRead(pinButton);
  }
  return current;
}

void Button()
{
    //ButtonPressed=digitalRead(pinButton);
    ButtonPressed = debounce (prevButt);
    if( ButtonPressed == HIGH && prevButt ==LOW)
    {
      sensorOn = !sensorOn;
    }
    prevButt= ButtonPressed;
}