#include <LiquidCrystal.h>

int potVal;
int scaleVal;

#define DIR_PIN 2
#define STEP_PIN 3

LiquidCrystal lcd(15, 14, 13, 12, 11, 10); 


void setup() {
  pinMode(STEP_PIN, OUTPUT);
  pinMode(DIR_PIN, OUTPUT);
  pinMode(28, INPUT);
  pinMode(27, INPUT);
  
  digitalWrite(STEP_PIN, LOW);
  
  Serial.begin(9600);

  lcd.begin(16, 2);

  lcd.print("Fan Percent: ");
  lcd.setCursor(1, 2);
}


void loop() {

  digitalWrite(DIR_PIN, HIGH);
  while (true) {
    scaleVal = (analogRead(27) );
    lcd.print(100 - (potVal / 10.23));
    lcd.setCursor(1, 2);

    Serial.println(analogRead(28));
    potVal = analogRead(28);


    digitalWrite(STEP_PIN, HIGH);
    digitalWrite(STEP_PIN, LOW);
    delay((potVal / (scaleVal / 50))); 
  }
}