#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
int milidetik = 0;
int detik = 0;
int menit = 0;
int jam = 0;
int potensio = A3;
int nilaipotensio;
int ledmerah = 10;
int ledkuning = 11;
int ledhijau = 12;
int ledbiru = 13;
int pushbutton1 = 2;
int pushbutton2 = 3;
int pushbutton3 = 4;

void setup() {
  lcd.init();
  lcd.backlight();
  pinMode(potensio, INPUT);
  pinMode(ledmerah, OUTPUT);
  pinMode(ledkuning, OUTPUT);
  pinMode(ledhijau, OUTPUT);
  pinMode(ledbiru, OUTPUT);
  pinMode(pushbutton1, INPUT_PULLUP);
  pinMode(pushbutton2, INPUT_PULLUP);
  pinMode(pushbutton3, INPUT_PULLUP);
}

void loop() {
  milidetik = milidetik+1;
  lcd.setCursor(9,0);
  lcd.print(milidetik);
  lcd.setCursor(6,0);
  lcd.print(detik);
  lcd.setCursor(3,0);
  lcd.print(menit);
  lcd.setCursor(0,0);
  lcd.print(jam);
   
  if (milidetik==10)
  {
    milidetik = 0;
    detik = detik+1;
  }
  else if(detik==10)
  {
    menit = menit+1;
    detik = 0;
  }
  else if(menit==10)
  {
    jam = jam+1;
    menit = 0;
  }

  int nilaipotensio = analogRead(potensio);

  if (nilaipotensio != 0)
  {
    lcd.setCursor(0,1);
    lcd.print(nilaipotensio);
    lcd.setCursor(3,1);
    lcd.print("             ");
  }
  else
  {
    lcd.setCursor(0,1);
    lcd.print("POLTEK PAJAJARAN");
  }

  int kecerahanLED = map(nilaipotensio, 0, 1023, 0, 255);
  analogWrite(ledmerah, kecerahanLED);

  if (digitalRead(pushbutton1) == LOW) {
    digitalWrite(ledkuning, HIGH);
    digitalWrite(ledbiru, HIGH);
    digitalWrite(ledhijau, LOW);
    delay(300);
  }
  else if (digitalRead(pushbutton2) == LOW) {
    digitalWrite(ledkuning, HIGH);
    digitalWrite(ledbiru, LOW);
    digitalWrite(ledhijau, HIGH); 
    delay(300);
  }
  else if (digitalRead(pushbutton3) == LOW) {
    digitalWrite(ledkuning, LOW);
    digitalWrite(ledbiru, HIGH);
    digitalWrite(ledhijau, HIGH);
    delay(300);
  }
  else {
    digitalWrite(ledkuning, HIGH);
    digitalWrite(ledbiru, HIGH);
    digitalWrite(ledhijau, HIGH);
  }
}