const int redA = 13;
const int yellowA = 12;
const int greenA = 11;

const int redB = 7;
const int yellowB = 6;
const int greenB = 5;

void setup() {
  pinMode(redA, OUTPUT);
  pinMode(yellowA, OUTPUT);
  pinMode(greenA, OUTPUT);
   

  pinMode(redB, OUTPUT);
  pinMode(yellowB, OUTPUT);
  pinMode(greenB, OUTPUT); 
}

void loop() {

  digitalWrite(redA,HIGH);
  digitalWrite(yellowA,LOW);
  digitalWrite(greenA,LOW);

   digitalWrite(redB,LOW);
   digitalWrite(yellowB,LOW);
   digitalWrite(greenB,HIGH);
    delay(5000);


   digitalWrite(redA,LOW);
  digitalWrite(yellowA,HIGH);
  digitalWrite(greenA,LOW);

   digitalWrite(redB,LOW);
   digitalWrite(yellowB,HIGH);
   digitalWrite(greenB,LOW);
     delay(2000);

   digitalWrite(redA,LOW);
  digitalWrite(yellowA,LOW);
  digitalWrite(greenA,HIGH);

   digitalWrite(redB,HIGH);
   digitalWrite(yellowB,LOW);
   digitalWrite(greenB,LOW);
   delay(5000);
}