void setup() {
  // put your setup code here, to run once:
pinMode(0, OUTPUT);
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
pinMode(14, OUTPUT);
pinMode(15, OUTPUT);
pinMode(16, OUTPUT);
pinMode(17, OUTPUT);
pinMode(18, OUTPUT);
pinMode(19, OUTPUT);
pinMode(20, OUTPUT);
pinMode(21, OUTPUT);
pinMode(22, OUTPUT);
pinMode(23, OUTPUT);
pinMode(24, OUTPUT);
pinMode(25, OUTPUT);
pinMode(26, OUTPUT);
pinMode(27, OUTPUT);
pinMode(28, OUTPUT);
pinMode(29, OUTPUT);
pinMode(30, OUTPUT);
pinMode(31, OUTPUT);
pinMode(32, OUTPUT);
pinMode(33, OUTPUT);
pinMode(34, OUTPUT);
pinMode(35, OUTPUT);
pinMode(36, OUTPUT);
pinMode(37, OUTPUT);
pinMode(38, OUTPUT);
pinMode(39, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(0, HIGH);
digitalWrite(0, LOW);
digitalWrite(1, HIGH);
digitalWrite(1, LOW);
digitalWrite(2, HIGH);
digitalWrite(2, LOW);
digitalWrite(3, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, HIGH);
digitalWrite(4, LOW);
digitalWrite(5, HIGH);
digitalWrite(5, LOW);
digitalWrite(6, HIGH);
digitalWrite(6, LOW);
digitalWrite(7, HIGH);
digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, HIGH);
digitalWrite(9, LOW);
delay(200);
digitalWrite(10, HIGH);
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
digitalWrite(11, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(13, HIGH);
digitalWrite(13, LOW);
digitalWrite(14, HIGH);
digitalWrite(14, LOW);
digitalWrite(15, HIGH);
digitalWrite(15, LOW);
digitalWrite(16, HIGH);
digitalWrite(16, LOW);
digitalWrite(17, HIGH);
digitalWrite(17, LOW);
digitalWrite(18, HIGH);
digitalWrite(18, LOW);
digitalWrite(19, HIGH);
digitalWrite(19, LOW);
delay(200);
digitalWrite(20, HIGH);
digitalWrite(20, LOW);
digitalWrite(21, HIGH);
digitalWrite(21, LOW);
digitalWrite(22, HIGH);
digitalWrite(22, LOW);
digitalWrite(23, HIGH);
digitalWrite(23, LOW);
digitalWrite(24, HIGH);
digitalWrite(24, LOW);
digitalWrite(25, HIGH);
digitalWrite(25, LOW);
digitalWrite(26, HIGH);
digitalWrite(26, LOW);
digitalWrite(27, HIGH);
digitalWrite(27, LOW);
digitalWrite(28, HIGH);
digitalWrite(28, LOW);
digitalWrite(29, HIGH);
digitalWrite(29, LOW);
delay(200);
digitalWrite(30, HIGH);
digitalWrite(30, LOW);
digitalWrite(31, HIGH);
digitalWrite(31, LOW);
digitalWrite(32, HIGH);
digitalWrite(32, LOW);
digitalWrite(33, HIGH);
digitalWrite(33, LOW);
digitalWrite(34, HIGH);
digitalWrite(34, LOW);
digitalWrite(35, HIGH);
digitalWrite(35, LOW);
digitalWrite(36, HIGH);
digitalWrite(36, LOW);
digitalWrite(37, HIGH);
digitalWrite(37, LOW);
digitalWrite(38, HIGH);
digitalWrite(38, LOW);
digitalWrite(39, HIGH);
digitalWrite(39, LOW);
delay(100);
digitalWrite(0, HIGH);
digitalWrite(0, LOW);
digitalWrite(10, HIGH);
digitalWrite(10, LOW);
digitalWrite(29, HIGH);
digitalWrite(29, LOW);
digitalWrite(39, HIGH);
digitalWrite(39, LOW);
delay(100);
digitalWrite(1, HIGH);
digitalWrite(1, LOW);
digitalWrite(11, HIGH);
digitalWrite(11, LOW);
digitalWrite(38, HIGH);
digitalWrite(38 , LOW);
digitalWrite(28 , HIGH);
digitalWrite(28, LOW);
delay(100);
digitalWrite(2, HIGH);
digitalWrite(2, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(27, HIGH);
digitalWrite(27, LOW);
digitalWrite(37, HIGH);
digitalWrite(37, LOW);
delay(100);
digitalWrite(3, HIGH);
digitalWrite(3, LOW);
digitalWrite(13, HIGH);
digitalWrite(13, LOW);
digitalWrite(26, HIGH);
digitalWrite(26, LOW);
digitalWrite(36, HIGH);
digitalWrite(36, LOW);
delay(100);
digitalWrite(4, HIGH);
digitalWrite(4, LOW);
digitalWrite(14, HIGH);
digitalWrite(14, LOW);
digitalWrite(25, HIGH);
digitalWrite(25, LOW);
digitalWrite(35, HIGH);
digitalWrite(35, LOW);
delay(100);
digitalWrite(5, HIGH);
digitalWrite(5, LOW);
digitalWrite(15, HIGH);
digitalWrite(15, LOW);
digitalWrite(24, HIGH);
digitalWrite(24, LOW);
digitalWrite(34, HIGH);
digitalWrite(34, LOW);
delay(100);
digitalWrite(6, HIGH);
digitalWrite(6, LOW);
digitalWrite(16, HIGH);
digitalWrite(16, LOW);
digitalWrite(23, HIGH);
digitalWrite(23, LOW);
digitalWrite(33, HIGH);
digitalWrite(33, LOW);
delay(100);
digitalWrite(7, HIGH);
digitalWrite(7, LOW);
digitalWrite(17, HIGH);
digitalWrite(17, LOW);
digitalWrite(22, HIGH);
digitalWrite(22, LOW);
digitalWrite(32, HIGH);
digitalWrite(32, LOW);
delay(100);
digitalWrite(8, HIGH);
digitalWrite(8, LOW);
digitalWrite(18, HIGH);
digitalWrite(18, LOW);
digitalWrite(21, HIGH);
digitalWrite(21, LOW);
digitalWrite(31, HIGH);
digitalWrite(31, LOW);
delay(100);
digitalWrite(9, HIGH);
digitalWrite(9, LOW);
digitalWrite(19, HIGH);
digitalWrite(19 , LOW);
digitalWrite(20, HIGH);
digitalWrite(20, LOW);
digitalWrite(30, HIGH);
digitalWrite(30, LOW);
delay(100);
digitalWrite(9, HIGH);
digitalWrite(9, LOW);
digitalWrite(19, HIGH);
digitalWrite(19, LOW);
digitalWrite(20, HIGH);
digitalWrite(20, LOW);
digitalWrite(30, HIGH);
digitalWrite(30, LOW);
delay(100);
digitalWrite(8, HIGH);
digitalWrite(8, LOW);
digitalWrite(18, HIGH);
digitalWrite(18, LOW);
digitalWrite(21, HIGH);
digitalWrite(21 , LOW);
digitalWrite(31 , HIGH);
digitalWrite(31, LOW);
delay(100);
digitalWrite(7, HIGH);
digitalWrite(7, LOW);
digitalWrite(17, HIGH);
digitalWrite(17, LOW);
digitalWrite(22, HIGH);
digitalWrite(22, LOW);
digitalWrite(32, HIGH);
digitalWrite(32, LOW);
delay(100);
digitalWrite(6, HIGH);
digitalWrite(6, LOW);
digitalWrite(16, HIGH);
digitalWrite(16, LOW);
digitalWrite(23, HIGH);
digitalWrite(23, LOW);
digitalWrite(33, HIGH);
digitalWrite(33, LOW);
delay(100);
digitalWrite(5, HIGH);
digitalWrite(5, LOW);
digitalWrite(15, HIGH);
digitalWrite(15, LOW);
digitalWrite(24, HIGH);
digitalWrite(24, LOW);
digitalWrite(34, HIGH);
digitalWrite(34, LOW);
delay(100);
digitalWrite(4, HIGH);
digitalWrite(4, LOW);
digitalWrite(14, HIGH);
digitalWrite(14, LOW);
digitalWrite(25, HIGH);
digitalWrite(25, LOW);
digitalWrite(35, HIGH);
digitalWrite(35, LOW);
delay(100);
digitalWrite(3, HIGH);
digitalWrite(3, LOW);
digitalWrite(13, HIGH);
digitalWrite(13, LOW);
digitalWrite(26, HIGH);
digitalWrite(26, LOW);
digitalWrite(36, HIGH);
digitalWrite(36, LOW);
delay(100);
digitalWrite(2, HIGH);
digitalWrite(2, LOW);
digitalWrite(12, HIGH);
digitalWrite(12, LOW);
digitalWrite(27, HIGH);
digitalWrite(27, LOW);
digitalWrite(37, HIGH);
digitalWrite(37, LOW);
delay(100);
digitalWrite(1, HIGH);
digitalWrite(1, LOW);
digitalWrite(11, HIGH);
digitalWrite(11, LOW);
digitalWrite(28, HIGH);
digitalWrite(28, LOW);
digitalWrite(38, HIGH);
digitalWrite(38, LOW);
delay(100);
digitalWrite(0, HIGH);
digitalWrite(0, LOW);
digitalWrite(10, HIGH);
digitalWrite(10 , LOW);
digitalWrite(29, HIGH);
digitalWrite(29, LOW);
digitalWrite(39, HIGH);
digitalWrite(39, LOW);
delay(100);
}