void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
pinMode(14, OUTPUT);
pinMode(17, OUTPUT);
pinMode(18, OUTPUT);
pinMode(19, OUTPUT);
} 
void loop() {
  digitalWrite(12, HIGH);
  digitalWrite(19, HIGH);
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(19, LOW);
  digitalWrite(13, HIGH);
  digitalWrite(18, HIGH);
  delay(2000);
  digitalWrite(13, LOW);
  digitalWrite(18, LOW);
  digitalWrite(14, HIGH);
  digitalWrite(17, HIGH);
  delay(2000);
  digitalWrite(14, LOW);
  digitalWrite(17, LOW);
  digitalWrite(13, HIGH);
  digitalWrite(18, HIGH);
  delay(1000); 
  digitalWrite(13, LOW);
  digitalWrite(18, LOW);  
}