const int outRed = 11;
const int outGreen = 10;
const int outBlue = 9;

bool btnState = true;
bool btnPrevState = true;
int ledState = 1;

void setup() {
  pinMode(outRed, OUTPUT); //RED
  pinMode(outGreen, OUTPUT); //GREEN
  pinMode(outBlue, OUTPUT); //BLUE
  pinMode(A0, INPUT_PULLUP); //Pushbutton

  Serial.begin(9600);
}

void loop() {
  btnState = digitalRead(A0);

  if (btnState != btnPrevState){
    if (btnState == LOW){
      ledState++;
      Serial.println(ledState);
    }
    delay(50);
  }

  btnPrevState = btnState;


  switch (ledState){
      case 1: //Red
        digitalWrite(outRed, HIGH);
        digitalWrite(outGreen, LOW);
        digitalWrite(outBlue, LOW);
        break;
      case 2: //Yellow
        digitalWrite(outRed, HIGH);
        digitalWrite(outGreen, HIGH);
        digitalWrite(outBlue, LOW);
        break;
      case 3: //Magenta
        digitalWrite(outRed, HIGH);
        digitalWrite(outGreen, LOW);
        digitalWrite(outBlue, HIGH);
        break;
      case 4: //Green
        digitalWrite(outRed, LOW);
        digitalWrite(outGreen, HIGH);
        digitalWrite(outBlue, LOW);
        break;
      case 5: //Cyan
        digitalWrite(outRed, LOW);
        digitalWrite(outGreen, HIGH);
        digitalWrite(outBlue, HIGH);
        break;
      case 6: //Blue
        digitalWrite(outRed, LOW);
        digitalWrite(outGreen, LOW);
        digitalWrite(outBlue, HIGH);
        break;
      case 7: //White
        digitalWrite(outRed, HIGH);
        digitalWrite(outGreen, HIGH);
        digitalWrite(outBlue, HIGH);
        break;
      case 8: //Rainbow
        digitalWrite(outRed, LOW);
        digitalWrite(outGreen, LOW);
        digitalWrite(outBlue, LOW);
        int fadeVal = 1;
        for (fadeVal =1; fadeVal<254; fadeVal++){
          analogWrite(outGreen, i);
          delay(10);
        }
        for (int i=255; i>2; i++){
          analogWrite(outGreen, i);
        }
        break;
      case 9: //Reset
        ledState = 1;
        break;
    }
}