int green = 27;
int orange =26;
int red =25;
void setup() {
 
  Serial.begin(115200);
  pinMode(green, OUTPUT);
  pinMode(orange, OUTPUT);
  pinMode(red, OUTPUT);
}

void loop() {
  delay(10);
  digitalWrite(green, HIGH);
  delay(2000);
  digitalWrite(green, LOW);
  digitalWrite(orange, HIGH);
  delay(2000);
  digitalWrite(orange, LOW);
  digitalWrite(red, HIGH);
  delay(2000);
  digitalWrite(red, LOW);
  
}