#define RED_PIN 11
#define GREEN_PIN 10
#define BLUE_PIN 9
#define delayLEDS 3
#define sensoRED_PIN A0

float sensorValue = 0, filteredSignal = 0,
    filteredSignalValues[] = {3.4, 3.1, 2.7, 2.4, 2.1, 1.7, 1.3, 0.9, 0.4};

void setup () {

  Serial.begin (9600);
}

void loop () {

  MainFunction();
}

void MainFunction() {

  sensorValue = (float) analogRead(sensoRED_PIN) * (5.0 / 1024.0);

  FilterSignal(sensorValue);

  Serial.print(sensorValue);
  Serial.print(" ");
  Serial.println(filteredSignal);

  CompareSignalFiltered(filteredSignal);
}

void FilterSignal(float sensorSignal) {

  filteredSignal = (0.945 * filteredSignal) + (0.0549 * sensorSignal);
}

void CompareSignalFiltered(float filteredSignal) {

  if (filteredSignal > filteredSignalValues[0]) {
    RGBColor(0, 0, 255);
    Serial.println("Blue");
  } else if (filteredSignal <= filteredSignalValues[0] && filteredSignal > filteredSignalValues[1]) {
    Serial.println("Azure");
    RGBColor(0, 255, 255);
  } else if (filteredSignal <= filteredSignalValues[1] && filteredSignal > filteredSignalValues[2]) {
    RGBColor(0, 127, 255);
    Serial.println("Cyan");
  } else if (filteredSignal <= filteredSignalValues[2] && filteredSignal > filteredSignalValues[3]) {
    RGBColor(0, 255, 127);
    Serial.println("Aqua marine");
  } else if (filteredSignal <= filteredSignalValues[3] && filteredSignal > filteredSignalValues[4]) {
    RGBColor(0, 255, 0);
    Serial.println("Green");
  } else if (filteredSignal <= filteredSignalValues[4] && filteredSignal > filteredSignalValues[5]) {
    RGBColor(255, 255, 0);
    Serial.println("Yellow");
  } else if (filteredSignal <= filteredSignalValues[5] && filteredSignal > filteredSignalValues[6]) {
    RGBColor(255, 0, 255);
    Serial.println("Magenta");
  } else if (filteredSignal <= filteredSignalValues[6] && filteredSignal > filteredSignalValues[7]) {
    RGBColor(255, 0, 127);
    Serial.println("Rose");
  } else if (filteredSignal <= filteredSignalValues[7] && filteredSignal > filteredSignalValues[8]) {
    RGBColor(255, 127, 0);
    Serial.println("Orange");
  } else if (filteredSignal <= filteredSignalValues[8]) {
    RGBColor(255, 0, 0);
    Serial.println("Red");
  } else {
    RGBColor(0, 0, 255);
    Serial.println("Default: Blue");
  }
}

void RGBColor(int Rcolor, int Gcolor, int Bcolor) {

  analogWrite(RED_PIN, Rcolor);
  analogWrite(GREEN_PIN, Gcolor);
  analogWrite(BLUE_PIN, Bcolor);

  delay(delayLEDS);
}