#define led1 23
#define led2 22
#define led3 19
#define led4 18
#define led5 5
#define led6 17
#define led7 16
#define led8 4

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(led7, OUTPUT);
  pinMode(led8, OUTPUT);
}

void loop() {
  //round 1
  digitalWrite(led1, 1);
  delay(500);
  digitalWrite(led2, 1);
  delay(500);
  digitalWrite(led3, 1);
  delay(500);
  digitalWrite(led4, 1);
  delay(500);
  digitalWrite(led5, 1);
  delay(500);
  digitalWrite(led6, 1);
  delay(500);
  digitalWrite(led7, 1);
  delay(500);
  digitalWrite(led8, 1);
  delay(500);
  digitalWrite(led1, 0);
  delay(500);
  digitalWrite(led2, 0);
  delay(500);
  digitalWrite(led3, 0);
  delay(500);
  digitalWrite(led4, 0);
  delay(500);
  digitalWrite(led5, 0);
  delay(500); 
  digitalWrite(led6, 0);
  delay(500);
  digitalWrite(led7, 0);
  delay(500);
  digitalWrite(led8, 0);
  delay(500);

//round 2
  digitalWrite(led8, 1);
  delay(500);
  digitalWrite(led7, 1);
  delay(500);
  digitalWrite(led6, 1);
  delay(500);
  digitalWrite(led5, 1);
  delay(500);
  digitalWrite(led4, 1);
  delay(500);
  digitalWrite(led3, 1);
  delay(500);
  digitalWrite(led2, 1);
  delay(500);
  digitalWrite(led1, 1);
  delay(500);
  digitalWrite(led8, 0);
  delay(500);
  digitalWrite(led7, 0);
  delay(500);
  digitalWrite(led6, 0);
  delay(500);
  digitalWrite(led5, 0);
  delay(500);
  digitalWrite(led4, 0);
  delay(500);
  digitalWrite(led3, 0);
  delay(500);
  digitalWrite(led2, 0);
  delay(500);
  digitalWrite(led1, 0);
  delay(1000);

//round 3
  digitalWrite(led1, 1);
  digitalWrite(led2, 0);
  digitalWrite(led3, 1);
  digitalWrite(led4, 0);
  digitalWrite(led5, 1);
  digitalWrite(led6, 0);
  digitalWrite(led7, 1);
  digitalWrite(led8, 0);
  delay(1000);
  digitalWrite(led1, 0);
  digitalWrite(led2, 1);
  digitalWrite(led3, 0);
  digitalWrite(led4, 1);
  digitalWrite(led5, 0);
  digitalWrite(led6, 1);
  digitalWrite(led7, 0);
  digitalWrite(led8, 1);
  delay(1000);
  digitalWrite(led1, 1);
  digitalWrite(led2, 0);
  digitalWrite(led3, 1);
  digitalWrite(led4, 0);
  digitalWrite(led5, 1);
  digitalWrite(led6, 0);
  digitalWrite(led7, 1);
  digitalWrite(led8, 0);
  delay(1000);
  digitalWrite(led1, 0);
  digitalWrite(led2, 0);
  digitalWrite(led3, 0);
  digitalWrite(led4, 0);
  digitalWrite(led5, 0);
  digitalWrite(led6, 0);
  digitalWrite(led7, 0);
  digitalWrite(led8, 0);
  delay(1000);

//round 4
  digitalWrite(led1, 1);
  digitalWrite(led8, 1);
  delay(500);
  digitalWrite(led2, 1);
  digitalWrite(led7, 1);
  delay(500);
  digitalWrite(led3, 1);
  digitalWrite(led6, 1);
  delay(500);
  digitalWrite(led4, 1);
  digitalWrite(led5, 1);
  delay(500);
  digitalWrite(led1, 0);
  digitalWrite(led8, 0);
  delay(500);
  digitalWrite(led2, 0);
  digitalWrite(led7, 0);
  delay(500);
  digitalWrite(led3, 0);
  digitalWrite(led6, 0);
  delay(500);
  digitalWrite(led4, 0);
  digitalWrite(led5, 0);
  delay(500);

//round 5
  digitalWrite(led4, 1);
  digitalWrite(led5, 1);
  delay(500);
  digitalWrite(led3, 1);
  digitalWrite(led6, 1);
  delay(500);
  digitalWrite(led2, 1);
  digitalWrite(led7, 1);
  delay(500);
  digitalWrite(led1, 1);
  digitalWrite(led8, 1);
  delay(500);
  digitalWrite(led4, 0);
  digitalWrite(led5, 0);
  delay(500);
  digitalWrite(led3, 0);
  digitalWrite(led6, 0);
  delay(500);
  digitalWrite(led2, 0);
  digitalWrite(led7, 0);
  delay(500);
  digitalWrite(led1, 0);
  digitalWrite(led8, 0);
  delay(500);
}