// Define LED pins
const int ledPins[] = {3, 5, 6, 9, 10};  // PWM pins for LEDs
const int buttonPin = 7;  // Button pin
int buttonState = 0;  // Variable to hold button state
int lastButtonState = 0;  // Variable to hold last button state
int mode = 0;  // To keep track of the current mode

// Define PWM values for brightness in different modes
int brightness[5] = {0, 255, 128, 64, 192}; // Different brightness levels for modes

void setup() {
  // Set LED pins as OUTPUT
  for (int i = 0; i < 5; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  
  // Set button pin as INPUT
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
  // Read the button state
  buttonState = digitalRead(buttonPin);
  
  // Detect button press (assuming a simple press for mode change)
  if (buttonState == LOW && lastButtonState == HIGH) {
    delay(50);  // debounce delay
    mode = (mode + 1) % 10;  // Cycle through 10 modes
  }

  lastButtonState = buttonState;

  // Execute behavior based on the current mode
  switch (mode) {
    case 0: // Mode 0: All LEDs OFF
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], 0);
      }
      break;

    case 1: // Mode 1: All LEDs ON full brightness
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], 255);
      }
      break;

    case 2: // Mode 2: LEDs fading in and out (simple PWM effect)
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], (millis() / 10 + i * 50) % 256);
      }
      break;

    case 3: // Mode 3: LEDs blink on and off with a delay
      for (int i = 0; i < 5; i++) {
        int value = (millis() / 500 + i) % 2 == 0 ? 255 : 0;
        analogWrite(ledPins[i], value);
      }
      break;

    case 4: // Mode 4: Random brightness for each LED
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], random(0, 256));
      }
      break;

    case 5: // Mode 5: LEDs with a wave pattern (PWM)
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], brightness[(millis() / 100 + i) % 5]);
      }
      break;

    // Add more modes as desired (up to mode 9)
    case 6: // Example: LEDs randomly blink
      for (int i = 0; i < 5; i++) {
        analogWrite(ledPins[i], random(0, 2) * 255);  // Random on/off
      }
      break;
      
    // You can continue with more cases as needed

  }
}