#define led_RED   11
#define led_GREEN 10
#define led_BLUE  9



void setup() {
  pinMode(led_RED, OUTPUT);
  pinMode(led_GREEN, OUTPUT);
  pinMode(led_BLUE, OUTPUT);
}

void loop() {
  for(int x = 0; x<255; x++){
    delay(10);
    analogWrite(led_RED, x);
    for(int y = 255; y>0; y = y-1){
      delay(10);
      analogWrite(led_GREEN, y);
    }
  }

}

void colourSet(int redVal, int grnVal, int blueVal){
  analogWrite(led_RED, redVal);
  analogWrite(led_GREEN, grnVal);
  analogWrite(led_BLUE, blueVal);
}