#define RED_PIN 9
#define GREEN_PIN 10
#define BLUE_PIN 11
#define LDR_PIN A0

void setup() {
    pinMode(RED_PIN, OUTPUT);
    pinMode(GREEN_PIN, OUTPUT);
    pinMode(BLUE_PIN, OUTPUT);
    Serial.begin(9600);
}

void loop() {
    int ldrValue = analogRead(LDR_PIN); // 讀取光敏電阻值

    // 根據環境亮度變化設定 RGB 值
    int redValue = map(ldrValue, 0, 1023, 0, 255);
    int greenValue = map(ldrValue, 0, 1023, 255, 0);
    int blueValue = 128; // 固定藍色值

    analogWrite(RED_PIN, redValue);
    analogWrite(GREEN_PIN, greenValue);
    analogWrite(BLUE_PIN, blueValue);

    Serial.print("LDR Value: ");
    Serial.print(ldrValue);
    Serial.print(" -> Red: ");
    Serial.print(redValue);
    Serial.print(" Green: ");
    Serial.print(greenValue);
    Serial.print(" Blue: ");
    Serial.println(blueValue);

    delay(200);
}