…
void loop() {
// if there's any serial available, read it:
while (Serial.available() > 0) {
// look for the next valid integer in the incoming serial stream:
int red = Serial.parseInt();
int green = Serial.parseInt();
int blue = Serial.parseInt();
int relais=Serial.parseInt();
int musik=Serial.parseInt();
int remote=Serial.parseInt();
// look for the newline. That's the end of your sentence:
if (Serial.read() == '\n') {…}
…}…}