#include <FastLED.h>

#define PIXEL_PIN 7
#define PIXELS 20
#define MAX_BRIGHTNESS 192

#define SCAN_WIDTH 3 //number of pixels sets width of "scanner" 
#define SCAN_SPEED 30 //how fast it moves larger number is slower speed
#define SCAN_RETURN 40 //how long it pauses before changing direction


CRGB leds[PIXELS];

/*
HSV Color Arrays
HUE Values (0-255)
0 = RED
32 = ORANGE
64 = YELLOW
96 = GREEN
128 = AQUA
160 = BLUE
192 = PURPLE
224 = PINK
*/ 

//HSV Arrays (HUE, SATURATION, BRIGHTNESS)
int BLACK[3] = {0,0,0};
int WHITE[3] = {0,0,255}; //draws a lot of current
int DIMWHTIE[3] = {0,0,192}; //less current draw
int RED[3] = {0,255,255};
int LTRED[3] = {0,170,255};
int ORANGE[3] = {32,255,255};
int LTORANGE[3] = {32,170,255};
int YELLOW[3] = {64, 255,255};
int LTYELLOW[3] = {64,170,255};
int GREEN[3] = {96,255,255};
int LTGREN[3] = {96,170,255};
int AQUA[3] = {128,255,255};
int BLUE[3] = {160,255,255};
int LTBLUE[3] = {160,170,255};
int PURPLE[3] = {192,255,255};
int LTPURPLE[3] = {192,170,255};
int PINK[3] = {224,255,255};


void setup()
{
  FastLED.addLeds<WS2811, PIXEL_PIN, GRB>(leds, PIXELS);
  LEDS.setBrightness(MAX_BRIGHTNESS);
}

void loop()
{
CylonBounce(RED);
}


void CylonBounce(int color[3])
{
  for(int i = 0; i < PIXELS-SCAN_WIDTH-2; i++) 
  {
    for(int i=0; i <PIXELS; i++)
    {
     leds[i] = CRGB(0,0,0);
    }
    leds[i] = CHSV(color[0],color[1],(color[2]/5));
    
    for(int j = 1; j <= SCAN_WIDTH; j++)
    {
      leds[i+j] = CHSV(color[0],color[1],color[2]);
    }
    leds[i+SCAN_WIDTH+1] = CHSV(color[0],color[1],(color[2]/5));
    
    FastLED.show();
    delay(SCAN_SPEED);
  }
  
 delay(SCAN_RETURN);
  

  for(int i = PIXELS-SCAN_WIDTH-2; i > 0; i--)
  {
    for(int i=0; i<PIXELS; i++)
    {
      leds[i] = CRGB(0,0,0);
    }
  
    leds[i] = CHSV(color[0],color[1],(color[2]/5));
    
    for(int j = 1; j <= SCAN_WIDTH; j++)
    {
      leds[i+j] = CHSV(color[0],color[1],color[2]);
    }
    leds[i+SCAN_WIDTH+1] = CHSV(color[0],color[1],(color[2]/5));
    
    FastLED.show();
    delay(SCAN_SPEED); 
  }
  delay(SCAN_RETURN);
}