char rgb;

void setup() {
  pinMode(A0, OUTPUT);
  pinMode(A1, OUTPUT);
  pinMode(A2, OUTPUT);
  digitalWrite(A0, HIGH);
  digitalWrite(A1, HIGH);
  digitalWrite(A2, HIGH);

  Serial.begin(9600);
  Serial.println("Zadanie");
}

void loop() {
if(Serial.available())
{
  rgb = Serial.read();
  Serial.println(rgb);
  delay(2);
  while(Serial.available())
  {
    Serial.read();
  }

  if(rgb=='z')
  {
    digitalWrite(A0, HIGH);
    digitalWrite(A1,LOW);
    digitalWrite(A2, HIGH);
  }
  else if(rgb=='c')
  {
    digitalWrite(A0, HIGH);
    digitalWrite(A1, HIGH);
    digitalWrite(A2, LOW);;
  }
  else if(rgb=='m')
  {
    digitalWrite(A0, LOW);
    digitalWrite(A1, HIGH);
    digitalWrite(A2, HIGH);
  }
  else{
    Serial.print("error");
  }
}
}