#define RED_PIN_R 2
#define YEL_PIN_R 4
#define YEL_PIN_G 3
#define GREEN_PIN_G 5

void setup() {
  pinMode(RED_PIN_R, OUTPUT);
  pinMode(YEL_PIN_R, OUTPUT);
  pinMode(YEL_PIN_G, OUTPUT);
  pinMode(GREEN_PIN_G, OUTPUT);
}

void loop() {
  digitalWrite(GREEN_PIN_G, 1);
  delay(7000);
  digitalWrite(GREEN_PIN_G, 0);
  delay(500);
  digitalWrite(GREEN_PIN_G, 1);
  delay(500);
  digitalWrite(GREEN_PIN_G, 0);
  delay(500);
  digitalWrite(GREEN_PIN_G, 1);
  delay(500);
  digitalWrite(GREEN_PIN_G, 0);
  delay(500);
  digitalWrite(GREEN_PIN_G, 1);
  delay(500);
  digitalWrite(GREEN_PIN_G, 0);
  digitalWrite(YEL_PIN_R, 1);
  digitalWrite(YEL_PIN_G, 1);
  delay(2000);
  digitalWrite(YEL_PIN_R, 0);
  digitalWrite(YEL_PIN_G, 0);
  digitalWrite(RED_PIN_R, 1);
  delay(8000);
  digitalWrite(YEL_PIN_R, 1);
  digitalWrite(YEL_PIN_G, 1);
  delay(2000);
  digitalWrite(YEL_PIN_R, 0);
  digitalWrite(YEL_PIN_G, 0);
  digitalWrite(RED_PIN_R, 0);
}