// Define the pins for the RGB LED
int redPin = 5;
int greenPin = 9;
int bluePin = 11;

// Define the pin for the active buzzer
int buzzerPin = 6;

// Define the pin for the push button
int buttonPin = 2;

// Variable to track the current color state
int colorState = 0; // 0 = Red, 1 = Green, 2 = Blue

// Variable to store the last state of the button
int lastButtonState = HIGH;

void setup() {
  // Set all component pins as outputs or inputs
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(buttonPin, INPUT);
}

void loop() {
  // Read the current state of the button
  int currentButtonState = digitalRead(buttonPin);

  // Check if the button has just been pressed
  // This logic is a simple way to "debounce" the button
  if (currentButtonState == HIGH && lastButtonState == LOW) {
    // A button press has occurred, so change the color
    changeColor();

    // Make the buzzer beep to indicate the color change
    beepBuzzer();

    // Small delay for debounce
    delay(50);
  }

  // Update the last button state for the next loop iteration
  lastButtonState = currentButtonState;
}

// Function to change the RGB LED color
void changeColor() {
  // First, turn off all LED colors
  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
  digitalWrite(bluePin, LOW);

  // Increment the color state and loop back to 0 if it exceeds 2
  colorState++;
  if (colorState > 2) {
    colorState = 0;
  }

  // Set the new color based on the current state
  if (colorState == 0) {
    digitalWrite(redPin, HIGH); // Turn on Red
  } else if (colorState == 1) {
    digitalWrite(greenPin, HIGH); // Turn on Green
  } else if (colorState == 2) {
    digitalWrite(bluePin, HIGH); // Turn on Blue
  }
}

// Function to make the buzzer beep
void beepBuzzer() {
  tone(buzzerPin, 255); // Turn the buzzer on
  delay(100);                    // Wait for 100 milliseconds
  noTone(buzzerPin);   // Turn the buzzer off
}