#include <Stepper.h>
#include <LiquidCrystal_I2C.h>

int step = 2;
int dir =3;

LiquidCrystal_I2C lcd1(0x27,16,2);
LiquidCrystal_I2C lcd2(0x26, 16, 2);
LiquidCrystal_I2C lcd3(0x25, 16, 2);
LiquidCrystal_I2C lcd4(0x24, 16, 2);

const int stepsPerRevolution = 200;
const float stepsPerDegree = stepsPerRevolution / 360.0; 
int revolutions=0;
int steps=0;

int pot = A0;
int delay_time =0;

void setup() {
  // put your setup code here, to run once:
   pinMode(step, OUTPUT);
   pinMode(dir, OUTPUT);

   lcd1.init();
   lcd1.backlight();

  lcd2.init();
  lcd2.backlight();

  lcd3.init();
  lcd3.backlight();

  lcd4.init();
  lcd4.backlight();

  lcd1.print("LCD 1");
  lcd1.setCursor(0,1);
  lcd1.print("0             90");

  lcd2.print("LCD 2");
  lcd2.setCursor(0,1);
  lcd2.print("91           180");

  lcd3.print("LCD 3");
  lcd3.setCursor(0,1);
  lcd3.print("181          270");

  lcd4.print("LCD 4");
  lcd4.setCursor(0,1);
  lcd4.print("271          360");
}

void loop() {
  // put your main code here, to run repeatedly:
        delay_time= map(analogRead(pot),0,1023,100,10);
        digitalWrite(dir, HIGH);
        digitalWrite(step, HIGH);
        delay(delay_time);
        digitalWrite(step, LOW);
        delay(delay_time);
        if(steps==200){
            
            //++revolutions;
            steps=0;
            lcd1.setCursor(0,1);
          lcd1.print("0             90");
          lcd2.setCursor(0,1);
          lcd2.print("91           180");
          lcd3.setCursor(0,1);
          lcd3.print("181          270");
          lcd4.setCursor(0,1);
          lcd4.print("271          360");
        }
        else{
          steps++;
        }
    

        float angle= steps/stepsPerDegree;

        if(angle>=0 && angle <=90){         
          for(int x=1;x<=14;x++){
            int column = map(angle,0, 90,1,14);
            lcd1.setCursor(column,1); 
            lcd1.print("_");           
          }
        }

          if(angle>=91 && angle <=180){         
          for(int x=2;x<=13;x++){
            int column = map(angle,91, 180,2,13);
            lcd2.setCursor(column,1); 
            lcd2.print("_");           
          }
        }
        
       if(angle>=181 && angle <=270){         
          for(int x=3;x<=12;x++){
            int column = map(angle,181, 270,3,12);
            lcd3.setCursor(column,1); 
            lcd3.print("_");           
          }
        }
        if(angle>=271 && angle <=360){         
          for(int x=3;x<=13;x++){
            int column = map(angle,271, 360,3,13);
            lcd4.setCursor(column,1); 
            lcd4.print("_");           
          }
          
        }
        //delay(10);
          
        
}