#include 

char serInString[100];  // array that will hold the different bytes of the string. 100=100characters;
                        // -> you must state how long the array will be else it won't work properly
char colorCode;
int colorVal;

int redPin   = 9;   // Red LED,   connected to digital pin 9
int greenPin = 10;  // Green LED, connected to digital pin 10
int bluePin  = 11;  // Blue LED,  connected to digital pin 11

int redValue = 0;
int greenValue = 0;
int blueValue = 0;

void setup() {
  pinMode(redPin,   OUTPUT);   // sets the pins as output
  pinMode(greenPin, OUTPUT);   
  pinMode(bluePin,  OUTPUT);
  Serial.begin(9600);
  analogWrite(redPin,   redValue);   // set them all to mid brightness
  analogWrite(greenPin, greenValue);   // set them all to mid brightness
  analogWrite(bluePin,  blueValue);   // set them all to mid brightness
  Serial.println("please enter a code to modify the color of the ghost: ");
  Serial.println("b = Blue");
  Serial.println("g = Green");
  Serial.println("y = Yellow");
  Serial.println("p = Pink");
  Serial.println("r = Red");
}

void loop () {
  //read the serial port and create a string out of what you read
  readSerialString(serInString, 100);
  changeColor(serInString, 100);
  resetSerialString(serInString, 100);  
  delay(100);  // wait a bit, for serial data
}

void resetSerialString (char *strArray, int length) {
  for (int i = 0; i < length; i++) {
    strArray[i] = '\0';
  }
}

//read a string from the serial and store it in an array
//you must supply the array variable
void readSerialString (char *strArray, int maxLength) {
  int i = 0;

  if(!Serial.available()) {
    return;
  }
  while (Serial.available() && i < maxLength) {
    strArray[i] = Serial.read();
    i++;
  }
}


//depending on the color code, adjust the color:
void changeColor(char *strArray, int maxLength) {
  int i = 0;
  while (i < maxLength && strArray[i] != '\0') {
    colorCode = serInString[i];    
    switch(colorCode)
    {
      case 'p':
        Serial.println("setting color to pink...");
        greenValue = 0;      
        blueValue = 30;  
        redValue = 255;      
        break;
      case 'r':
        Serial.println("setting color to red...");
        greenValue = 0;      
        blueValue = 0;  
        redValue = 255;      
        break;
      case 'b':
        Serial.println("setting color to blue...");
        greenValue = 0;      
        blueValue = 255;  
        redValue = 0;      
        break;
      case 'g':
        Serial.println("setting color to green...");
        greenValue = 255;      
        blueValue = 0;  
        redValue = 0;      
        break;
      case 'y':
        Serial.println("setting color to yellow...");
        greenValue = 131;      
        blueValue = 7;  
        redValue = 245;      
        break;
    }
    
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);    
    analogWrite(redPin, redValue);
    
    //increment counter:
    i++;
  }
}


//depending on the color code, adjust the color:
void changeColorByName(char *strArray, int maxLength) {
    if(stringsEqual(strArray, "blue", 4))
    {
        Serial.println("setting color to blue...");
        greenValue = 0;      
        blueValue = 255;  
        redValue = 0;  
    }
    else if(stringsEqual(strArray, "red", 3))
    {
        Serial.println("setting color to red...");
        greenValue = 0;      
        blueValue = 0;  
        redValue = 255;  
    }
    else if(stringsEqual(strArray, "pink", 4))
    {
        Serial.println("setting color to pink...");
        greenValue = 0;      
        blueValue = 30;  
        redValue = 255;      
    }
    else if(stringsEqual(strArray, "yellow", 6))
    {
        Serial.println("setting color to yellow...");
        greenValue = 131;      
        blueValue = 7;  
        redValue = 245;      
    }
    else if(stringsEqual(strArray, "green", 5))
    {
        Serial.println("setting color to green...");
        greenValue = 255;      
        blueValue = 0;  
        redValue = 0;      
    }
    else
    {
      Serial.println("Color code not recognized.");
    }
    
    analogWrite(greenPin, greenValue);
    analogWrite(bluePin, blueValue);    
    analogWrite(redPin, redValue);
    
}