// For: https://forum.arduino.cc/t/arduino-nano-does-not-recognize-green-as-command/1039813
// Fixed the '\n' as mentioned by "er_name_not_found"
// Removed the command.equals("0") as mentioned by Coding_Badly
// Formatted the text

const int rPin2 = 3;
const int gPin2 = 5;
const int bPin2 = 6;
const int rPin = 9;
const int gPin = 10;
const int bPin = 11;

String myCom;
String command;
String com = "OK";

float dFact = 1;
float rBright = 255;
float gBright = 255;
float bBright = 255;
float rBright2 = 255;
float gBright2 = 255;
float bBright2 = 255;

void setup() {
  Serial.begin(9600);
  pinMode(rPin, OUTPUT);
  pinMode(gPin, OUTPUT);
  pinMode(bPin, OUTPUT);
  pinMode(rPin2, OUTPUT);
  pinMode(gPin2, OUTPUT);
  pinMode(bPin2, OUTPUT);
}

void loop() {
  if (Serial.available()) {
    command = Serial.readStringUntil('\n');           // fixed
    
    if (command.equals("red")) {
      myCom = "red";
      Serial.println(com);
    } else if (command.equals("green")) {
      myCom = "green";
      Serial.println(com);
    } else if (command.equals("purple")) {
      myCom = "purple";
      Serial.println(com);
    } else if (command.equals("all red")) {
      myCom = "2red";
      Serial.println(com);
    } else if (command.equals("all green")) {
      myCom = "2green";
      Serial.println(com);
    } else if (command.equals("all white")) {
      myCom = "2white";
      Serial.println(com);
    } else if (command.equals("all blue")) {
      myCom = "2blue";
      Serial.println(com);
    } else if (command.equals("white")) {
      myCom = "white";
      Serial.println(com);
    } else if (command.equals("blue")) {
      myCom = "blue";
      Serial.println(com);
    } else if (command.equals("red2")) {
      myCom = "red2";
      Serial.println(com);
    } else if (command.equals("green2")) {
      myCom = "green2";
      Serial.println(com);
    } else if (command.equals("white2")) {
      myCom = "white2";
      Serial.println(com);
    } else if (command.equals("blue2")) {
      myCom = "blue2";
      Serial.println(com);
    } else if (command.equals("alloff")) {
      myCom = "alloff";
      Serial.println(com);
    } else if (command.equals("off1")) {
      myCom = "off1";
      Serial.println(com);
    } else if (command.equals("off2")) {
      myCom = "off2";
      Serial.println(com);
    } else if (command.equals("100")) {
      myCom = "100";
      Serial.println(com);
    } else if (command.equals("75")) {
      myCom = "75";
      command.equals("0");
      Serial.println(com);
    } else if (command.equals("50")) {
      myCom = "50";
      Serial.println(com);
    } else if (command.equals("25")) {
      myCom = "25";
      Serial.println(com);
    } else if (command.equals("alarm")) {
      myCom = "ALARM";
      Serial.println(com);
    } else {
      Serial.println("Invalid Command");
    }
  }

  if (myCom == "alloff") {
    rBright = 0;
    gBright = 0;
    bBright = 0;
    rBright2 = 0;
    gBright2 = 0;
    bBright2 = 0;
  }
  if (myCom == "red2") {
    rBright2 = 255;
    gBright2 = 0;
    bBright2 = 0;
  }
  if (myCom == "2red") {
    rBright2 = 255;
    gBright2 = 0;
    bBright2 = 0;
    rBright = 255;
    gBright = 0;
    bBright = 0;
  }
  if (myCom == "green2") {
    rBright2 = 0;
    gBright2 = 255;
    bBright2 = 0;
  }
  if (myCom == "2green") {
    rBright2 = 0;
    gBright2 = 255;
    bBright2 = 0;
    rBright = 0;
    gBright = 255;
    bBright = 0;
  }
  if (myCom == "white2") {
    rBright2 = 255;
    gBright2 = 255;
    bBright2 = 255;
  }
  if (myCom == "2white") {
    rBright2 = 255;
    gBright2 = 255;
    bBright2 = 255;
    rBright = 255;
    gBright = 255;
    bBright = 255;
  }
  if (myCom == "blue2") {
    rBright2 = 0;
    gBright2 = 0;
    bBright2 = 255;
  }
  if (myCom == "2blue") {
    rBright2 = 0;
    gBright2 = 0;
    bBright2 = 255;
    rBright = 0;
    gBright = 0;
    bBright = 255;
  }
  if (myCom == "red") {
    rBright = 255;
    gBright = 0;
    bBright = 0;
  }
  if (myCom == "green") {
    rBright = 0;
    gBright = 255;
    bBright = 0;
  }
  if (myCom == "white") {
    rBright = 255;
    gBright = 255;
    bBright = 255;
  }
  if (myCom == "blue") {
    rBright = 0;
    gBright = 0;
    bBright = 255;
  }
  if (myCom == "purple") {
    rBright2 = 255;
    gBright2 = 0;
    bBright2 = 180;
    rBright = 255;
    gBright = 0;
    bBright = 255;
  }
  if (myCom == "off1") {
    rBright = 0;
    gBright = 0;
    bBright = 0;
  }
  if (myCom == "off2") {
    rBright2 = 0;
    gBright2 = 0;
    bBright2 = 0;
  }
  if (myCom == "25") {
    dFact = .15;
  }
  if (myCom == "50") {
    dFact = .5;
  }
  if (myCom == "75") {
    dFact = .75;
  }
  if (myCom == "100") {
    dFact = 1;
  }
  if (myCom == "ALARM") {
    dFact = 1;
    gBright = 0;
    bBright = 0;
    gBright2 = 0;
    bBright2 = 0;
 
    for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) {
      analogWrite(rPin, fadeValue);
      analogWrite(rPin2, fadeValue);
      delay(5);
    }
 
    for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) {
      analogWrite(rPin, fadeValue);
      analogWrite(rPin2, fadeValue);
      delay(5);
    }
  }

  analogWrite(rPin, rBright * dFact);
  analogWrite(gPin, gBright * dFact);
  analogWrite(bPin, bBright * dFact);
  analogWrite(rPin2, rBright2 * dFact);
  analogWrite(gPin2, gBright2 * dFact);
  analogWrite(bPin2, bBright2 * dFact);
}