void setup() {
  
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);

}

void loop() {
  
  digitalWrite(13, 1);
  delay(500);
  digitalWrite(13, 0);
  delay(500);
  digitalWrite(12, 1);
  delay(500);
  digitalWrite(12, 0);
  delay(500);
  digitalWrite(11, 1);
  delay(500);
  digitalWrite(11, 0);
  delay(500);
  digitalWrite(10, 1);
  delay(500);
  digitalWrite(10, 0);
  delay(500);
  digitalWrite(9, 1);
  delay(500);
  digitalWrite(9, 0);
  delay(500);
  digitalWrite(8, 1);
  delay(500);
  digitalWrite(8, 0);
  delay(500);
  ////////////////////////////////////////////////////////////////2
  digitalWrite(8, 1);
  delay(500);
  digitalWrite(8, 0);
  delay(500);
  digitalWrite(9, 1);
  delay(500);
  digitalWrite(9, 0);
  delay(500);
  digitalWrite(10, 1);
  delay(500);
  digitalWrite(10, 0);
  delay(500);
  digitalWrite(11, 1);
  delay(500);
  digitalWrite(11, 0);
  delay(500);
  digitalWrite(12, 1);
  delay(500);
  digitalWrite(12, 0);
  delay(500);
  digitalWrite(13, 1);
  delay(500);
  digitalWrite(13, 0);
  delay(500);
  //////////////////////////////////////////////////3
  digitalWrite(13, 1);
  digitalWrite(12, 1);
  digitalWrite(11, 1);
  digitalWrite(10, 1);
  digitalWrite(9, 1);
  digitalWrite(8, 1);
  delay(500);
  //////////////////////////////////////////////////4
  digitalWrite(13, 0);
  digitalWrite(12, 0);
  digitalWrite(11, 0);
  digitalWrite(10, 0);
  digitalWrite(9, 0);
  digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 1);
  digitalWrite(12, 1);
  digitalWrite(11, 1);
  digitalWrite(10, 1);
  digitalWrite(9, 1);
  digitalWrite(8, 1);
  delay(500);
  //////////////////////////////////////////////////4
  digitalWrite(13, 0);
  digitalWrite(12, 0);
  digitalWrite(11, 0);
  digitalWrite(10, 0);
  digitalWrite(9, 0);
  digitalWrite(8, 0);
  delay(500); digitalWrite(13, 1);
  digitalWrite(12, 1);
  digitalWrite(11, 1);
  digitalWrite(10, 1);
  digitalWrite(9, 1);
  digitalWrite(8, 1);
  delay(500);
  //////////////////////////////////////////////////4
  digitalWrite(13, 0);
  digitalWrite(12, 0);
  digitalWrite(11, 0);
  digitalWrite(10, 0);
  digitalWrite(9, 0);
  digitalWrite(8, 0);
  delay(500);

  //////////////////////////////////////วิ่งเข้าหากัน
  digitalWrite(13, 1); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 0); digitalWrite(8, 1);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 1); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 1); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 1); digitalWrite(9, 0); digitalWrite(8, 1);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 0); digitalWrite(11, 1); digitalWrite(10, 1); digitalWrite(9, 0); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 0); digitalWrite(12, 1); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 1); digitalWrite(8, 0);
  delay(500);
  digitalWrite(13, 1); digitalWrite(12, 0); digitalWrite(11, 0); digitalWrite(10, 0); digitalWrite(9, 0); digitalWrite(8, 1);
  delay(500);
}