// Controlling an LED strip with a radial potentiometer
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN            A1
#define NUMPIXELS      5
int potPin = A0;

int val = 0;
int writeval = 0;

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

//Color values for the whole strip between 0 and 255
int R = 100;
int redMap = 0;
int G = 100;
int greenMap = 0;
int B = 100;
int blueMap = 0;

void setup() {
  pixels.begin();
  Serial.begin(9600);

  for(int i=0; i<5; i++){
    pixels.setPixelColor(i, pixels.Color(R,0,0));
  }
  pixels.show();
}

void loop() {

  val = analogRead(potPin);
  writeval = map(val, 0, 1023, 0, 6);
  Serial.println(val);

  if(val<206){ //Red stays 100, green goes from 0-100, blue stays 0

    greenMap = map(val, 0, 205, 0, 100);

    for(int i=0; i<5; i++){
      pixels.setPixelColor(i, pixels.Color(R,greenMap,0));
    }
    pixels.show();

  }

  else if(val<411 && val>205){ //Red goes from 100-0, green stays 100, blue stays 0

    redMap = map(val, 206, 410, 100, 0);

    for(int i=0; i<5; i++){
      pixels.setPixelColor(i, pixels.Color(redMap,G,0));
    }
    pixels.show();

  }

  else if(val<616 && val>410){ //Red stays 0, green goes from 100-0, blue goes from 0-100

    greenMap = map(val, 411, 615, 100, 0);
    blueMap = map(val, 411, 615, 0, 100);

    for(int i=0; i<5; i++){
      pixels.setPixelColor(i, pixels.Color(0,greenMap,blueMap));
    }
    pixels.show();

  }

  else if(val<821 && val>615){ //Red goes from 0-100, green stays 0, blue stays 100

    redMap = map(val, 616, 820, 0, 100);

    for(int i=0; i<5; i++){
      pixels.setPixelColor(i, pixels.Color(redMap,0,B));
    }
    pixels.show();

  }

  else{
    for(int i=0; i<5; i++){ //Red stays 100, green stays 0, blue goes from 100-0

      blueMap = map(val, 821, 1023, 100, 0);

      pixels.setPixelColor(i, pixels.Color(R,0,blueMap));
    }
    pixels.show();

  }


}