const int kRed   = 12;
const int kGreen = 14;
const int kBlue  = 15;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  Serial.println("Init");
  pinMode(kRed,   OUTPUT);
  pinMode(kGreen, OUTPUT);
  pinMode(kBlue,  OUTPUT);

}

int counter = 0;

void loop() {

  analogWrite(kRed, counter);
  analogWrite(kGreen, counter);
  analogWrite(kBlue, counter);

  counter++;
  if (counter >= PWMRANGE) {
    counter = 0;
  }
  delay(10);
}