void setup() {
  // put your setup code here, to run once:
pinMode(51, OUTPUT);
pinMode(50, OUTPUT);
pinMode(49, OUTPUT);
pinMode(48, OUTPUT);
pinMode(47, OUTPUT);
pinMode(46, OUTPUT);
pinMode(45, OUTPUT);
pinMode(44, OUTPUT);
pinMode(43, OUTPUT);
pinMode(42, OUTPUT);}
void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(51, HIGH);
delay(500);
digitalWrite(51, LOW);
digitalWrite(50, HIGH);
delay(500);
digitalWrite(50, LOW);
digitalWrite(49, HIGH);
delay(500);
digitalWrite(49, LOW);
digitalWrite(48, HIGH);
delay(500);
digitalWrite(48, LOW);
digitalWrite(47, HIGH);
delay(500);
digitalWrite(47, LOW);
digitalWrite(46, HIGH);
delay(500);
digitalWrite(46, LOW);
digitalWrite(45, HIGH);
delay(500);
digitalWrite(45, LOW);
digitalWrite(44, HIGH);
delay(500);
digitalWrite(44, LOW);
digitalWrite(43, HIGH);
delay(500);
digitalWrite(43, LOW);
digitalWrite(42, HIGH);
delay(500);
digitalWrite(42, LOW);
digitalWrite(42, HIGH);
delay(500);
digitalWrite(42, LOW);
digitalWrite(43, HIGH);
delay(500);
digitalWrite(43, LOW);
digitalWrite(44, HIGH);
delay(500);
digitalWrite(44, LOW);
digitalWrite(45, HIGH);
delay(500);
digitalWrite(45, LOW);
digitalWrite(46, HIGH);
delay(500);
digitalWrite(46, LOW);
digitalWrite(47, HIGH);
delay(500);
digitalWrite(47, LOW);
digitalWrite(48, HIGH);
delay(500);
digitalWrite(48, LOW);
digitalWrite(49, HIGH);
delay(500);
digitalWrite(49, LOW);
digitalWrite(50, HIGH);
delay(500);
digitalWrite(50, LOW);
digitalWrite(51, HIGH);
delay(500);
digitalWrite(51, LOW);}