#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int trigger =6 ;  int echo=5; long duration; long distance ;  

int buzzer = 3; nit led=13;
int red = 11; int green=10; int blue=9;

void setup() {
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(red,OPUTPUT);
  pinMode(green,OUTPUT);
  pinMode(blue,OUTPUT);
  
  Serial.begin(9600); 
  lightc(255,255,0);
  delay(3000);

  lcd.init();      // Initialize the LCD
  lcd.backlight(); // Turn on the backlight
 } //END SETUP ============

void loop() {
  myUltrasonic();  
  Serial.print("Distance: "); 
  Serial.println(distance);   

  if (distance < 200) {
    tone(buzzer, 1000); 
    lightc(225,0,0);
  }else{  
   noTone(buzzer);
  }

  if(distance>200){
    light(0,255,0) ;
  }
  else{
  
   }
  
  lcd.setCursor(0, 0);
  lcd.print("distance");
  lcd.setCursor(0, 1);
  lcd.print(distance);
  delay(500); 

} ////END LOOP ============

void myUltrasonic(){
  digitalWrite(trigger, LOW);
  delayMicroseconds(5);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(13);
  digitalWrite(trigger, LOW);
  duration = pulseIn(echo, HIGH);
  distance = (duration * 0.0343) / 2;

} //END UNTRASONIC FUNCTION =====