#define TRIGPIN 6
#define ECHOPIN 7
#include <LiquidCrystal.h>
LiquidCrystal lcd ( 8 , 9 , 10 , 11 , 12 , 13 ) ;
int jarak , timer ;
void setup () {
 lcd.begin ( 16 , 2 ) ;
 lcd.print (" Sensor Parkir ") ;
 lcd.setCursor ( 0 , 1 ) ;
 lcd.print (" Mobil    ");
 delay ( 2000 ) ;
 lcd.clear ( ) ;
 lcd.print ("Status= ") ;

 pinMode ( ECHOPIN , INPUT ) ;
 pinMode ( TRIGPIN , OUTPUT ) ;
 pinMode ( 5 , OUTPUT ) ;
}
void loop () {
  digitalWrite (TRIGPIN,LOW) ;
  delayMicroseconds ( 2 ) ;
  digitalWrite ( TRIGPIN , HIGH ) ;
  delayMicroseconds ( 10 ) ;
  digitalWrite ( TRIGPIN , LOW ) ;
  timer= pulseIn(ECHOPIN, HIGH);
  jarak = timer / 58 ;
  if ( jarak > 200 ) {
    lcd.setCursor ( 7,0 ) ;
    lcd.print ("Aman") ;
}
 else if ( jarak > 150 ) {
   lcd.setCursor ( 7,0 ) ;
   lcd.print ("Awas") ;
    digitalWrite ( 5,1 ) ;
    delay ( 500 ) ;
    digitalWrite ( 5,0 ) ;
    delay ( 500 ) ;
 }
 else if ( jarak > 100 ) {
  lcd.setCursor ( 7,0 ) ;
  lcd.print ("Waspada") ;
  digitalWrite ( 5,1 ) ;
  delay ( 300 ) ;
  digitalWrite ( 5,0 ) ;
  delay ( 300 ) ;
 }
 else {
  lcd.setCursor ( 7,0 ) ;
  lcd.print ("Bahaya") ;
  digitalWrite ( 5,1 ) ;
  delay ( 100 ) ;
  digitalWrite ( 5,0 ) ;
  delay ( 100 ) ;
  }
}