//Tugas_Contoh Simulasi LEDx8

int ledPins[] = {2,3,4,5,6,7,8,9};  
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup()
{
  lcd.init();
  lcd.backlight();
  pinMode(ledPins[0],OUTPUT);  //ledPins[0] = 2
  pinMode(ledPins[1],OUTPUT);  //ledPins[1] = 3
  pinMode(ledPins[2],OUTPUT);  //ledPins[2] = 4
  pinMode(ledPins[3],OUTPUT);  //ledPins[3] = 5
  pinMode(ledPins[4],OUTPUT);  //ledPins[4] = 6
  pinMode(ledPins[5],OUTPUT);  //ledPins[5] = 7
  pinMode(ledPins[6],OUTPUT);  //ledPins[6] = 8
  pinMode(ledPins[7],OUTPUT);  //ledPins[7] = 9
}

void loop() {
  
  oneAfterAnother();      
  oneOnAtATime();         
  pingPong();            
  marquee();              
  randomLED();            
}

void oneAfterAnother()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Mode 1");
  lcd.setCursor(0, 1);
  lcd.print("oneAfterAnother");
  
  int index;
  int delayTime = 200; 

  for(index = 0; index <= 7; index = ++index) 
  {
    digitalWrite(ledPins[index], HIGH);
    delay(delayTime);  }                                  

  for(index = 7; index >= 0; index = --index) 
  {
    digitalWrite(ledPins[index], LOW);
    delay(delayTime);  }               
}


void oneOnAtATime()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Mode 2");
  lcd.setCursor(1, 1);
  lcd.print("oneOnAtATime");

  int index;
  int delayTime = 200; 

  for(index = 0; index <= 7; index = ++index) 
  {
    digitalWrite(ledPins[index], HIGH);  
    delay(delayTime);
    digitalWrite(ledPins[index], LOW); }
}


void pingPong()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Mode 3");
  lcd.setCursor(2, 1);
  lcd.print("pingPong");

  int index;
  int delayTime = 200; 

  for(index = 0; index <= 7; index = ++index)  
  {
    digitalWrite(ledPins[index], HIGH);  
    delay(delayTime);                    
    digitalWrite(ledPins[index], LOW); }

  for(index = 7; index >= 0; index = --index)
  {
    digitalWrite(ledPins[index], HIGH);  
    delay(delayTime);
    digitalWrite(ledPins[index], LOW); }
}


void marquee()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Mode 4");
  lcd.setCursor(2, 1);
  lcd.print("marquee");

  int index;
  int delayTime = 200;

  for(index = 0; index <= 3; index++) 
  {
    digitalWrite(ledPins[index], HIGH);
    digitalWrite(ledPins[index+4], HIGH);
    delay(delayTime); 
    digitalWrite(ledPins[index], LOW);
    digitalWrite(ledPins[index+4], LOW); }
}


void randomLED()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("Mode 5");
  lcd.setCursor(2, 1);
  lcd.print("randomLED");
  
  int index;
  int delayTime;

  index = random(8);
  delayTime = 200;

    digitalWrite(ledPins[index], HIGH);
    delay(delayTime);
    digitalWrite(ledPins[index], LOW); }