//traffic light at the cross road (two traffic lights series)
// 1st way
int led_R1 = 27;
int led_Y1 = 14;
int led_G1 = 12;
// 2nd way
int led_R2 = 17;
int led_Y2 = 16;
int led_G2 = 4;

void setup() {
  Serial.begin(9600);
  pinMode(led_R1, OUTPUT);
  pinMode(led_Y1, OUTPUT);
  pinMode(led_G1, OUTPUT);

  pinMode(led_R2, OUTPUT);
  pinMode(led_Y2, OUTPUT);
  pinMode(led_G2, OUTPUT);
}
  

void loop() {
  // Traffic light sequence

  // STOP
  digitalWrite(led_R1, HIGH);
  digitalWrite(led_Y1, LOW);
  digitalWrite(led_G1, LOW);
  Serial.print("STOP ");
  for (int i = 5; i >= 0; i--) {
    Serial.println(i);
    delay(1000);
  }
   digitalWrite(led_G2, HIGH);
  digitalWrite(led_R2, LOW);
  digitalWrite(led_Y2, LOW);
  Serial.print("STOP ");
  for (int i = 5; i >= 0; i--) {
    Serial.println(i);
    delay(1000);
  }

  // READY
  digitalWrite(led_Y1, HIGH);
  digitalWrite(led_R1, LOW);
  digitalWrite(led_G1, LOW);
  Serial.print("READY ");
  for (int i = 3; i >= 0; i--) {
    Serial.println(i);
    delay(1000);
  }
  digitalWrite(led_Y2, HIGH);
  digitalWrite(led_R2, LOW);
  digitalWrite(led_G2, LOW);
  Serial.print("READY ");
  for (int i = 3; i >= 0; i--) {
    Serial.println(i);
    delay(1000);
  }

  // GO
  digitalWrite(led_G1, HIGH);
  digitalWrite(led_R1 , LOW);
  digitalWrite(led_Y1, LOW);
  Serial.print("GO ");
  for (int j = 10; j >= 0; j--) {
    Serial.println(j);
    delay(1000);
  }
  digitalWrite(led_R2, HIGH);
  digitalWrite(led_Y2, LOW);
  digitalWrite(led_G2, LOW);
  Serial.print("GO ");
  for (int j = 10; j >= 0; j--) {
    Serial.println(j);
    delay(1000);
  }
}