Write a program to interface a button and an RGB LED with the Arduino. On each button press, the RGB LED should change its color in the sequence: Red, Green, Blue.

Write a program to interface a button and an RGB LED with the Arduino. On each button press, the RGB LED should change its color in the

sequence: Red, Green, Blue.

#define BUTTON_PIN 7
#define RED_PIN 11
#define GREEN_PIN 9
#define BLUE_PIN 10

int colorState = 0;
int lastButtonState = HIGH;

void setup() {
  pinMode(BUTTON_PIN, INPUT_PULLUP);  // Button with internal pull-up
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);

  // Detect button press (HIGH to LOW transition)
  if (buttonState == LOW && lastButtonState == HIGH) {
    colorState = (colorState + 1) % 3;  // Cycle through 0,1,2
    setColor(colorState);
    delay(200);  // Simple debounce
  }

  lastButtonState = buttonState;
}

void setColor(int state) {
  // Turn OFF all colors first
  digitalWrite(RED_PIN, LOW);
  digitalWrite(GREEN_PIN, LOW);
  digitalWrite(BLUE_PIN, LOW);

  if (state == 0) {
    digitalWrite(RED_PIN, HIGH);    // Red
  } else if (state == 1) {
    digitalWrite(GREEN_PIN, HIGH);  // Green
  } else if (state == 2) {
    digitalWrite(BLUE_PIN, HIGH);   // Blue
  }
}