// Define pin numbers for LEDs
#define LED1 0
#define LED2 1
#define LED3 2
#define LED4 3
#define LED5 4

void setup() {
  // Set LED pins as outputs
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
}

void loop() {
  // Chase all LEDs back and forth 3 times
  for (int i = 0; i < 3; i++) {
    for (int led = 0; led <= 4; led++) {
      digitalWrite(LED1, HIGH);
      delay(1000);
      digitalWrite(LED2, LOW);
    }
    for (int led = 3; led >= 1; led--) {
      digitalWrite(LED3, HIGH);
      delay(1000);
      digitalWrite(LED4, LOW);
    }
  }

  // Blink each LED a certain number of times
  for (int i = 0; i < 3; i++) {
    // Blink LED 1 once
    digitalWrite(LED1, HIGH);
    delay(1000);
    digitalWrite(LED1, LOW);

    // Blink LED 2 twice
    digitalWrite(LED2, HIGH);
    delay(1000);
    digitalWrite(LED2, LOW);
    delay(1000);
    digitalWrite(LED2, HIGH);
    delay(1000);
    digitalWrite(LED2, LOW);

    // Blink LED 3 three times
    for (int j = 0; j < 3; j++) {
      digitalWrite(LED3, HIGH);
      delay(1000);
      digitalWrite(LED3, LOW);
      delay(1000);
    }

    // Blink LED 4 four times
    for (int j = 0; j < 4; j++) {
      digitalWrite(LED4, HIGH);
      delay(1000);
      digitalWrite(LED4, LOW);
      delay(1000);
    }

    // Blink LED 5 five times
    for (int j = 0; j < 5; j++) {
      digitalWrite(LED5, HIGH);
      delay(1000);
      digitalWrite(LED5, LOW);
      delay(1000);
    }
  }

  // Chase LEDs 1, 3, and 5 back and forth 3 times
  for (int i = 0; i < 3; i++) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED5, HIGH);
    delay(1000);
    digitalWrite(LED1, LOW);
    digitalWrite(LED3, LOW);
    digitalWrite(LED5, LOW);
    delay(1000);
    digitalWrite(LED5, HIGH);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED1, HIGH);
    delay(1000);
    digitalWrite(LED5, LOW);
    digitalWrite(LED3, LOW);
    digitalWrite(LED1, LOW);
    delay(1000);
  }

  // Chase LEDs 1, 2, and 4 back and forth 3 times
  for (int i = 0; i < 3; i++) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED4, HIGH);
    delay(1000);
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED4, LOW);
    delay(1000);
    digitalWrite(LED4, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED1, HIGH);
    delay(1000);
    digitalWrite(LED4, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED1, LOW);
    delay(1000);
  }
}