int green  = 19;
int yellow = 18;
int red = 5;
void setup() 
{
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  for(int i=0;i<3;i++)
  {
    pinMode( green,OUTPUT);
    pinMode(yellow, OUTPUT);
    pinMode(red, OUTPUT);
  }
}

void loop()
{
  // put your main code here, to run repeatedly:
  digitalWrite(yellow, LOW);
  digitalWrite(red, HIGH);
  for (int i = 15; i > 0; i--)
  {
    Serial.println("wait for " + String(i) + "Seconds");
    delay(1000);
  }
  digitalWrite(red, LOW);
  digitalWrite(green, HIGH);
  for (int i = 30; i > 0; i--)
  {
    if (i > 5)
    {
      Serial.println("go for " + String(i) + "Seconds");
    }
    if (i <= 5)
    {
      digitalWrite(green, LOW);
      digitalWrite(yellow, HIGH);
      Serial.println("wait for " + String(i) + "Seconds");
    }
  delay(1000);
  }
  // digitalWrite(yellow, LOW);
  // delay(10); // this speeds up the simulation
}