const byte PIN_ROT_u8 = 11;
const byte PIN_GRUEN_u8 = 10;
const byte PIN_BLAU_u8 = 9;
const byte PIN_TASTER_u8 = 13;
const byte AN = 0;
const byte AUS = 255;
int CASE_s16 = 1;
byte DELAY_RGB_DURCHLAUF_u8 = 3;


void setup() {
  pinMode(PIN_TASTER_u8, INPUT);
  pinMode(PIN_ROT_u8, OUTPUT);
  pinMode(PIN_GRUEN_u8, OUTPUT);
  pinMode(PIN_BLAU_u8, OUTPUT);
}

void loop() {
  if(digitalRead(PIN_TASTER_u8) == HIGH){
    if(CASE_s16 == 5){
        CASE_s16 = 1;
    }
    else{
      CASE_s16++;
    }
    delay(200);
  }
  switch (CASE_s16){

    case 1:
      analogWrite(PIN_ROT_u8, 0);
      analogWrite(PIN_GRUEN_u8, 0);
      analogWrite(PIN_BLAU_u8, 0);
      break;

    case 2:
      analogWrite(PIN_GRUEN_u8, 255);
      analogWrite(PIN_BLAU_u8, 255);
      break;

    case 3:
      analogWrite(PIN_ROT_u8, 255);
      analogWrite(PIN_BLAU_u8, 0);
      break;

    case 4:
      analogWrite(PIN_ROT_u8, 255);
      analogWrite(PIN_GRUEN_u8, 0);
      analogWrite(PIN_BLAU_u8, 255);
      break;

    case 5:

      for(byte GRUEN_u8 = AUS; GRUEN_u8 > AN; GRUEN_u8++){
        //analogWrite(PIN_ROT_u8, AN);
        analogWrite(PIN_GRUEN_u8, GRUEN_u8);
        //analogWrite(PIN_BLAU_u8, AUS);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      for(byte ROT_u8 = AN; ROT_u8 < AUS; ROT_u8--){
        analogWrite(PIN_ROT_u8, ROT_u8);
        //analogWrite(PIN_GRUEN_u8, AN);
        //analogWrite(PIN_BLAU_u8, AUS);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      for(byte BLAU_u8 = AUS; BLAU_u8 > AN; BLAU_u8++){
        //analogWrite(PIN_ROT_u8, AUS);
        //analogWrite(PIN_GRUEN_u8, AN);
        analogWrite(PIN_BLAU_u8, BLAU_u8);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      for(byte GRUEN_u8 = AN; GRUEN_u8 < AUS; GRUEN_u8--){
        //analogWrite(PIN_ROT_u8, AUS);
        analogWrite(PIN_GRUEN_u8, GRUEN_u8);
        //analogWrite(PIN_BLAU_u8, AN);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      for(byte ROT_u8 = AUS; ROT_u8 > AN; ROT_u8++){
        analogWrite(PIN_ROT_u8, ROT_u8);
        //analogWrite(PIN_GRUEN_u8, AUS);
        //analogWrite(PIN_BLAU_u8, AN);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      for(byte BLAU_u8 = AN; BLAU_u8 < AUS; BLAU_u8--){
        //analogWrite(PIN_ROT_u8, AN);
        //analogWrite(PIN_GRUEN_u8, AUS);
        analogWrite(PIN_BLAU_u8, BLAU_u8);
        delay(DELAY_RGB_DURCHLAUF_u8);
      }

      break;
    }
}