#include <NewPing.h>
#define trig 9
#define echo 10
#define max_distance 400
#define red 11
#define green 12
#define buzzer 8
#define blue 13
#define slide_switch1 2
#define slide_switch2 4


NewPing sonar (trig,echo,max_distance);
int distance = 0 ;
int  state1 =0;
int  state2 = 0;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(red , OUTPUT);
  pinMode(green , OUTPUT);
  pinMode(blue , OUTPUT);
  pinMode(buzzer , OUTPUT);
  pinMode(slide_switch1 , INPUT);
  pinMode(slide_switch2 , INPUT);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  state1=digitalRead(slide_switch1);
  state2=digitalRead(slide_switch2);
  while(state2==HIGH){
  Serial.print("distance = ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(1000);
  if (distance <15 ){
    digitalWrite(red, LOW);
    digitalWrite(green, HIGH);
    digitalWrite(blue, HIGH);
    digitalWrite(buzzer, HIGH);
  }
  else if (distance >=15 && distance<30){
    digitalWrite(red, HIGH);
    digitalWrite(green, LOW);
    digitalWrite(blue, HIGH);
    digitalWrite(buzzer, LOW);
  }
  else if (distance >=30 && distance <50){
    digitalWrite(red, HIGH);
    digitalWrite(green, HIGH);
    digitalWrite(blue, LOW);
    digitalWrite(buzzer, LOW);
  }
  else if (distance >=50){
    digitalWrite(red, LOW);
    digitalWrite(green, LOW);
    digitalWrite(blue, LOW);
    digitalWrite(buzzer, LOW);
  }
  }
  

}