int red_light=11;
int green_light=10;
int blue_light=9;
void setup() {
  pinMode(red_light, OUTPUT);
  pinMode(green_light, OUTPUT);
  pinMode(blue_light, OUTPUT);

}

void loop() {
  RGB_color(255,0,0);
  delay(1000);
  RGB_color(0,255,0);
  delay(1000);
  RGB_color(0,0,255);
  delay(1000);
}
void RGB_color(int red_light_value, int green_light_value, int blue_light_value)
{
  analogWrite(red_light,red_light_value);
  analogWrite(green_light, green_light_value);
  analogWrite(blue_light, blue_light_value);
}