// Pin settings
const int ledPins[] = {5, 6, 7, 8, 9, 10, 11, 12}; // LED pins
const int buttonPin = 2;  // Button pin

// Variables
int pattern = 0;           // Current pattern state
bool buttonPressed = false; // Button state

void setup() {
  // Initialize LED pins as outputs
  for (int i = 0; i < 8; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  // Initialize button pin as input
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  // Check if the button is pressed
  if (digitalRead(buttonPin) == LOW && !buttonPressed) {
    buttonPressed = true;
    pattern = (pattern + 1) % 6;  // Move to the next pattern (cycle through 6 patterns)
    delay(200); // Debounce delay
  } else if (digitalRead(buttonPin) == HIGH) {
    buttonPressed = false;
  }

  // Execute the selected pattern
  switch (pattern) {
    case 0:
      pattern1();
      break;
    case 1:
      pattern2();
      break;
    case 2:
      pattern3();
      break;
    case 3:
      pattern4();
      break;
    case 4:
      pattern5();
      break;
    case 5:
      // Do nothing, turn off all LEDs
      allOff();
      break;
  }
}

// Pattern 1: LED chase from pin 5 to pin 12, on then off
void pattern1() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(500);
    digitalWrite(ledPins[i], LOW);
  }
}

// Pattern 2: LED chase from pin 12 to pin 5, on then off
void pattern2() {
  for (int i = 7; i >= 0; i--) {
    digitalWrite(ledPins[i], HIGH);
    delay(500);
    digitalWrite(ledPins[i], LOW);
  }
}

// Pattern 3: LEDs from pin 12 and 6 running towards each other, then back
void pattern3() {
  for (int i = 0; i < 4; i++) {
    digitalWrite(ledPins[7 - i], HIGH);  // Pin 12 inward
    digitalWrite(ledPins[i], HIGH);      // Pin 5 outward
    delay(500);
    digitalWrite(ledPins[7 - i], LOW);
    digitalWrite(ledPins[i], LOW);
  }
  for (int i = 3; i >= 0; i--) {
    digitalWrite(ledPins[7 - i], HIGH);  // Pin 12 outward
    digitalWrite(ledPins[i], HIGH);      // Pin 5 inward
    delay(500);
    digitalWrite(ledPins[7 - i], LOW);
    digitalWrite(ledPins[i], LOW);
  }
}

// Pattern 4: LEDs chase from pin 5 to pin 12, stay on, then turn off all and repeat once
void pattern4() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(500);
  }
  delay(500);  // Pause with all LEDs on
  allOff();
  delay(500);  // Pause before repeating
  
  // Repeat the chase
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], HIGH);
    delay(500);
  }
  delay(500);  // Pause with all LEDs on
  allOff();
}

// Pattern 5: All LEDs on, then off
void pattern5() {
  allOn();
  delay(1000);  // Keep all LEDs on for 1 second
  allOff();
}

// Turn all LEDs off
void allOff() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], LOW);
  }
}

// Turn all LEDs on
void allOn() {
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], HIGH);
  }
}