#include <LiquidCrystal_I2C.h>

#define NUM_LEDS 5
const int leds[NUM_LEDS] = {2,3,4,5,6};

LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  lcd.init();
  lcd.backlight();
  for(int i=0;i<NUM_LEDS;i++) pinMode(leds[i],OUTPUT);
}

void loop() {
  // Running lights effect
  lcd.setCursor(0,0);
  lcd.print("Running Lights  ");
  
  for(int i=0;i<NUM_LEDS;i++){
    digitalWrite(leds[i], HIGH);
    delay(500);
    digitalWrite(leds[i], LOW);
  }
  
  // Blinking all LEDs
  lcd.setCursor(0,0);
  lcd.print("Blink Effect    ");
  
  for(int j=0;j<3;j++){ // blink 3 times
    for(int i=0;i<NUM_LEDS;i++) digitalWrite(leds[i], HIGH);
    delay(500);
    for(int i=0;i<NUM_LEDS;i++) digitalWrite(leds[i], LOW);
    delay(500);
  }
  
  // Alternate LEDs
  lcd.setCursor(0,0);
  lcd.print("Alternate Blink ");
  for(int k=0;k<3;k++){
    for(int i=0;i<NUM_LEDS;i++){
      digitalWrite(leds[i], i%2 == 0 ? HIGH : LOW);
    }
    delay(500);
    for(int i=0;i<NUM_LEDS;i++){
      digitalWrite(leds[i], i%2 == 0 ? LOW : HIGH);
    }
    delay(500);
  }
}