#define R 17
#define G 18
#define B 19

void setup() {
  pinMode(R,OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
  Serial.begin(9600);
}

void Led_RGB(byte VR,byte VG,byte VB){
  analogWrite(R,VR);
  analogWrite(G,VG);
  analogWrite(B,VB);
}
void loop() {
  Led_RGB(255,0,255);
  delay(1000);
  Led_RGB(0,255,255);
  delay(1000);
  Led_RGB(255,255,0);
  delay(1000);
}