void setup() {
// put your setup code here,to run once
Serial.begin(115200);
pinMode(12, OUTPUT);
pinMode(26, OUTPUT);
pinMode(13, OUTPUT);

}

void loop() {
  digitalWrite(12, HIGH);
  Serial.println("stop");
  delay(4000);
  digitalWrite(12, LOW);
  delay(2000);
  digitalWrite(26, HIGH);
 Serial.println("GET READY");
 delay(4000);
 digitalWrite(26, LOW);
 delay(2000);
 digitalWrite(13, HIGH);
 Serial.println("GO");
 delay(4000);
 digitalWrite(13, LOW);
 delay(2000);
}