const int r1=5;
const int y1=6;
const int g1=7;

const int r2=A0;
const int y2=A1;
const int g2=A2;

const int r3=8;
const int y3=9;
const int g3=10;

const int r4=A3;
const int y4=A4;
const int g4=A5;


void setup() {

pinMode(r1, OUTPUT);
pinMode(r2, OUTPUT);
pinMode(y1, OUTPUT);
pinMode(y2, OUTPUT);
pinMode(g1, OUTPUT);
pinMode(g2, OUTPUT);
pinMode(r3, OUTPUT);
pinMode(r4, OUTPUT);
pinMode(y3, OUTPUT);
pinMode(y4, OUTPUT);
pinMode(g3, OUTPUT);
pinMode(g4, OUTPUT);



}

void loop() {

  digitalWrite(g1, HIGH);
  digitalWrite(r2, HIGH);
  digitalWrite(r3, HIGH);
  digitalWrite(r4, HIGH);
  delay(5000);

  digitalWrite(g1, LOW);
  digitalWrite(y1, HIGH);
  delay(2000);

  digitalWrite(y1, LOW);
  digitalWrite(r1, HIGH);
  digitalWrite(g2, HIGH);
  digitalWrite(r2, LOW);
  delay(5000);

  digitalWrite(g2, LOW);
  digitalWrite(y2, HIGH);
  delay(2000);

  digitalWrite(y2, LOW);
  digitalWrite(r2, HIGH);
  digitalWrite(g3, HIGH);
  digitalWrite(r3, LOW);
  delay(5000);

  digitalWrite(g3, LOW);
  digitalWrite(y3, HIGH);
  delay(2000);

  digitalWrite(y3, LOW);
  digitalWrite(r3, HIGH);
  digitalWrite(g4, HIGH);
  digitalWrite(r4, LOW);
  delay(5000);

  digitalWrite(g4, LOW);
  digitalWrite(y4, HIGH);
  delay(2000);

  digitalWrite(y4, LOW);
  digitalWrite(r4, LOW);
  digitalWrite(r1, LOW);

}