/* LED RGB — campur warna dengan PWM (analogWrite) */ const int redPin   = 9;const int greenPin = 10;const int bluePin  = 11; int r = 255;   // nilai 0..255int g = 0;int b = 0; void setup() {  pinMode(redPin,   OUTPUT);  pinMode(greenPin, OUTPUT);  pinMode(bluePin,  OUTPUT);} void loop() {  analogWrite(redPin,   r);  analogWrite(greenPin, g);  analogWrite(bluePin,  b);  delay(20);}