byte red=19;
byte green=18;
byte yellow=5;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(yellow, OUTPUT);
}


void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  digitalWrite(green, HIGH);
  for(int i=30;i>=1;i--)
    Serial.println("Go for "+String(i)+" seconds");
  delay(30000);
  digitalWrite(green, LOW);
  digitalWrite(yellow, HIGH);
  for(int i=5;i>=1;i--)
    Serial.println("Observe "+String(i)+" seconds");
  delay(5000);
  digitalWrite(yellow, LOW);
  digitalWrite(red, HIGH);
  for(int i=30;i>=1;i--)
    Serial.println("Stop "+String(i)+" seconds");
  delay(30000);
  digitalWrite(red, LOW);


}