#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,2,3,4,5);   
int red=7;
int yellow=8;
int green=9;
int n=30;
int k=20;
int l=10;
int m=5;
void setup() {
  pinMode(7,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);
  Serial.begin(9600);
  lcd.begin(16,1);
  // put your setup code here, to run once:

}

void loop() {
  //IR SENSORS
  Serial.print("p     :");
  int p = (analogRead(A0));
  Serial.println(p);
  Serial.print("q    :");
  int q =  (analogRead(A1));
  Serial.println(q);
   //Serial.print("r     :");
  int r =  (analogRead(A2));
  //Serial.println(r);
   //]
   
   Serial.print("s     :");
  int s = (analogRead(A3));
  //Serial.println(s);

  if( p<500 & q<500 & r<500 & s<500)
  {
    digitalWrite(9,HIGH);
    while(n>0)
    {
      lcd.setCursor(0,0);
      lcd.print(n);
      delay(1000);
      lcd.clear();
      n--;
    }
    digitalWrite(9,LOW);
    digitalWrite(8,HIGH);
    delay(500);
    digitalWrite(8,LOW);
    digitalWrite(7,HIGH);
    delay(2000);
    digitalWrite(7,LOW);
  }
   else if( p<500 & q<500 & r<500 & s>500)
  {
    digitalWrite(9,HIGH);
    while(k>0)
    {
      lcd.setCursor(0,0);
      lcd.print(k);
      delay(1000);
      lcd.clear();
      k--;
    }
    digitalWrite(9,LOW);
    digitalWrite(8,HIGH);
    delay(500);
    digitalWrite(8,LOW);
    digitalWrite(7,HIGH);
    delay(2000);
    digitalWrite(7,LOW);
  }
   else if( p<500 & q<500 & r>500 & s>500)
  {
    digitalWrite(9,HIGH);
    while(l>0)
    {
      lcd.setCursor(0,0);
      lcd.print(l);
      delay(1000);
      lcd.clear();
      l--;
    }
    digitalWrite(9,LOW);
    digitalWrite(8,HIGH);
    delay(500);
    digitalWrite(8,LOW);
    digitalWrite(7,HIGH);
    delay(2000);
    digitalWrite(7,LOW);
  }
     else if( p<500 & q >500 & r>500 & s>500)
  {
    digitalWrite(9,HIGH);
    while(m>0)
    {
      lcd.setCursor(0,0);
      lcd.print(m);
      delay(1000);
      lcd.clear();
      m--;
    }
    digitalWrite(9,LOW);
    digitalWrite(8,HIGH);
    delay(500);
    digitalWrite(8,LOW);
    digitalWrite(7,HIGH);
    delay(2000);
    digitalWrite(7,LOW);
  }

}