#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

int s1=12;
int s2=11;
int s3=10;

int v1;
int v2;
int v3;

int l1=5;
int l2=4;
int l3=3;
int l4=2;

void setup() {
Serial.begin(9600);
 pinMode(s1, INPUT);
 pinMode(s2, INPUT);
 pinMode(s3, INPUT);

 pinMode(l1, OUTPUT);
 pinMode(l2, OUTPUT);
 pinMode(l3, OUTPUT);
 pinMode(l4, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(1,0);
  lcd.print("HELLO WORLD <3");
  delay(2000);
  lcd.clear();

}
void loop(){
 v1 = digitalRead(s1);
 v2 = digitalRead(s2);
 v3 = digitalRead(s3);

 Serial.print(v1);
 Serial.print(v2);
 Serial.println(v3);

if(v1==1){
  digitalWrite(l1,1);
  digitalWrite(l2,1);
  digitalWrite(l3,0);
  digitalWrite(l4,0);

  lcd.setCursor(0,0);
  lcd.print(" RED,GREEN ");
}

if(v2==1){
  digitalWrite(l1,0);
  digitalWrite(l2,0);
  digitalWrite(l3,1);
  digitalWrite(l4,1);

  lcd.setCursor(0,0);
  lcd.print("YELLOW,PINK");
}

if(v3==1){
  digitalWrite(l1,0);
  digitalWrite(l2,0);
  digitalWrite(l3,0);
  digitalWrite(l4,0);

  lcd.setCursor(0,0);
  lcd.print("    OFF    ");
}

}