#include<SoftwareSerial.h>
int Red=13;
int Yellow=12;
int Green=11;
void setup()
{
 pinMode(Red,OUTPUT);
  pinMode(Yellow,OUTPUT);
  pinMode(Green,OUTPUT);
  }
 void loop()
 {
  digitalWrite(Red,HIGH);
  digitalWrite(Yellow,LOW);
  digitalWrite(Green,LOW); 
   delay(10000);

   digitalWrite(Red,LOW);
  digitalWrite(Yellow,HIGH);
  digitalWrite(Green,LOW) ; 
   delay(5000);

   digitalWrite(Red,LOW);
  digitalWrite(Yellow,LOW);
  digitalWrite(Green,HIGH); 
   delay(20000);
   
  }