void setup(){
  pinMode(23,OUTPUT);
  pinMode(22,OUTPUT);
  pinMode(21,OUTPUT);
  pinMode(19,OUTPUT);
  pinMode(18,OUTPUT);
  pinMode(5,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(2,OUTPUT);
  pinMode(15,OUTPUT);
  pinMode(17, OUTPUT);
  
}
void loop(){
  digitalWrite(23,HIGH);
  delay(500);
  digitalWrite(22,HIGH);
  delay(500);
  digitalWrite(21,HIGH);
  delay(500);
  digitalWrite(19,HIGH);
  delay(500);
  digitalWrite(18,HIGH);
  delay(500);
  digitalWrite(5,HIGH);
  delay(500);
  digitalWrite(4,HIGH);
  delay(500);
  digitalWrite(17,HIGH);
  delay(500);
  digitalWrite(2,HIGH);
  delay(500);
  digitalWrite(15,HIGH);
  delay(500);
  
}