int sensorValue = 0;
int value = 0;

int redPin = 12;
int greenPin = 10;
int bluePin = 6;

int redVal = 255;
int greenVal = 255;
int blueVal = 255;

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  pinMode(9, INPUT);
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  int sensorValue = analogRead(9);
  // print out the value you read:

  sensorValue = constrain(sensorValue, 0, 850);

  // Go from white to Cyan
  if (sensorValue >= 0 && sensorValue <= 300);
  {
    int CyanColor = map (sensorValue, 0,300,0,255); 
     redVal = 255 - CyanColor;
     greenVal = 255;
     blueVal = 255;
     // CyanColor rgb ( 0, 255, 255) 0 to 300
  }

  // Go from Cyan to Green
   if(sensorValue > 300 && sensorValue <= 450){
      int GreenColor = map(sensorValue, 300,450,0,255);
      redVal = 0;
      greenVal = 255;
      blueVal = 255 - GreenColor;
      // GreenColor  rgb(0,255,0)  300 -  450
 }

// Go from Green to Yellow
   if(sensorValue > 450 && sensorValue <= 600){
    int YellowR = map(sensorValue, 450,600,0,255);
    redVal = YellowR;
    greenVal = 255;
    blueVal = 0;
    // yellow rgb(255,255,0) 450 to 600
 }


   // Go from Yellow to Magenta
   if(sensorValue > 600 && sensorValue <= 750){
    int MagentaR = map(sensorValue, 600,750,0,255);
    redVal = 255;
    greenVal = 255 - MagentaR;
    blueVal = MagentaR;
    // Magneta rgb(255,0,255) 600 to 750
 }

  // Go from Magenta to Red
   if(sensorValue > 750 && sensorValue <= 850){
    int RedR = map(sensorValue, 750,850,0,255);
    redVal = 255;
    greenVal = 0;
    blueVal = 255 - RedR;
    // Red rgb(255,0,0) 750 to 850
 }


analogWrite(redPin, redVal);
analogWrite(greenPin, greenVal);
analogWrite(bluePin, blueVal);


Serial.print("sensorValue = ");Serial.print(sensorValue);Serial.print(" | ");
Serial.print("RedVal = ");Serial.print(redVal);Serial.print(" | ");
Serial.print("GreenVal = ");Serial.print(greenVal);Serial.print(" | ");
Serial.print("BlueVal = ");Serial.println(blueVal);

  delay(10);        // delay in between reads for stability

}