int ledM=13;
int ledH=12;
int kolom =16;
int baris = 2;
#define ECHO 10
#define TRIG 11
#include <Servo.h>
#include <LiquidCrystal_I2C.h>

Servo servoku;
int sudut;
int Buzzer =7;

LiquidCrystal_I2C lcd(0x27, kolom, baris);

void setup() {
  servoku.attach (9);
    pinMode(ledM,OUTPUT);
      pinMode(ledH,OUTPUT);
        pinMode(ECHO,INPUT);
          pinMode(TRIG,OUTPUT);
            pinMode(Buzzer,OUTPUT);
              lcd.init();
                lcd.backlight();

                }
                  float jarak_cm(){
                      digitalWrite(TRIG, LOW);
                          delayMicroseconds(2);
                              digitalWrite(TRIG, HIGH);
                                  delayMicroseconds(10);
                                      digitalWrite(TRIG, LOW);
                                          int durasi = pulseIn(ECHO, HIGH);
                                              return durasi*0.034/2;
                                                }


                                                void loop() {
                                                  float jarak = jarak_cm ();
                                                    if (jarak>150){
                                                      digitalWrite (ledM,HIGH);
                                                        digitalWrite (ledH,LOW);
                                                          tone (Buzzer,1000,200);
                                                            servoku.write (90);
                                                              int i;
                                                                lcd.setCursor(0,0);
                                                                  lcd.print("AWAS ADA ");
                                                                    lcd.setCursor(0,1);
                                                                      lcd.print("KERETA");

                                                                        }else{
                                                                          digitalWrite (ledM,LOW);
                                                                            digitalWrite (ledH,HIGH);
                                                                              servoku.write (0);
                                                                                lcd.setCursor(0,0);
                                                                                  lcd.print("KERETA API");
                                                                                    lcd.setCursor(0,1);
                                                                                      lcd.print("SUDAH LEWAT");
                                                                                        }
                                                                                        }