int rot = 9;
int gruen = 10;
int blau = 11;
int poti;

void setup() {
  Serial.begin(9600);
}

void loop() {
  poti = analogRead(A0);
  int pwm = map(poti, 0, 1023, 0, 255);
  analogWrite(blau, 0);
  analogWrite(rot, pwm);
  analogWrite(gruen, 255 - pwm);
  Serial.print("Rotwert: "); Serial.print(pwm); Serial.print("   ");
  Serial.print("Gruenwert: "); Serial.println(255 - pwm);
  delay(5);
}