void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
 pinMode(27, OUTPUT);
 pinMode(14, OUTPUT);
 pinMode(25, OUTPUT);
pinMode(21, OUTPUT);
pinMode(18, OUTPUT);
pinMode(17,OUTPUT);
}

void loop() {
digitalWrite(27, HIGH);
digitalWrite(21, HIGH);
delay(2000);
digitalWrite(21, LOW);
digitalWrite(27, LOW);
delay(1000);
digitalWrite(14, HIGH);
digitalWrite(18, HIGH);
delay(1000);
digitalWrite(18,LOW);
digitalWrite(14, LOW);
delay(2000);
digitalWrite(25, HIGH);
digitalWrite(17, HIGH);
delay(1500);
digitalWrite(17, LOW);
digitalWrite(25,LOW);
delay(2000);
}