#include <Adafruit_NeoPixel.h> //Make sure to include the Adafruit library in order to enable controlling of the Neopixels
#ifdef __AVR__
 #include <avr/power.h>
#endif
#define PIN            12 //This is where the data line of your Neopixels will connect to. It can be any number pin really, I just chose 12.
#define NUMPIXELS      21 //This is where we determine the number of pixels. I am only using 21 for each strip on the actual skateboard, so that's what I chose.
#define STRING_LENGTH0   21 //If you want to be able to control individual pixels in a "moving" string of neopixels, making different stringlengths from the maximum down to 1 is important.
#define STRING_LENGTH   20
#define STRING_LENGTH2   19
#define STRING_LENGTH3   18
#define STRING_LENGTH4   17
#define STRING_LENGTH5   16
#define STRING_LENGTH6   15
#define STRING_LENGTH7   14
#define STRING_LENGTH8   13
#define STRING_LENGTH9  12
#define STRING_LENGTH10  10
#define STRING_LENGTH11  9
#define STRING_LENGTH12  8
#define STRING_LENGTH13  7
#define STRING_LENGTH14  6
#define STRING_LENGTH15  5
#define STRING_LENGTH16  4
#define STRING_LENGTH17  3
#define STRING_LENGTH18  2
#define STRING_LENGTH19  1
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
int delayval = 5000/100; //100 = 1 second, and this will control how "fast" your string of Neopixels "moves"
void setup() {
 pixels.begin();
}
void loop() {
 int i=0;
 while(true) {
   // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
   pixels.setPixelColor(i-STRING_LENGTH, pixels.Color(255,0,0));    
   pixels.setPixelColor(i-STRING_LENGTH2, pixels.Color(240,0,0));  
   pixels.setPixelColor(i-STRING_LENGTH3, pixels.Color(250,110,0));   
   pixels.setPixelColor(i-STRING_LENGTH4, pixels.Color(255,165,0));
   pixels.setPixelColor(i-STRING_LENGTH5, pixels.Color(255,190,0));
   pixels.setPixelColor(i-STRING_LENGTH6, pixels.Color(255,220,0));
   pixels.setPixelColor(i-STRING_LENGTH7, pixels.Color(255,255,0));
   pixels.setPixelColor(i-STRING_LENGTH8, pixels.Color(150,210,0));
   pixels.setPixelColor(i-STRING_LENGTH9, pixels.Color(90,170,0));
   pixels.setPixelColor(i-STRING_LENGTH10, pixels.Color(0,128,0));
   pixels.setPixelColor(i-STRING_LENGTH11, pixels.Color(0,70,90));
   pixels.setPixelColor(i-STRING_LENGTH12, pixels.Color(0,30,175));
   pixels.setPixelColor(i-STRING_LENGTH13, pixels.Color(0,0,255));
   pixels.setPixelColor(i-STRING_LENGTH14, pixels.Color(25,0,200));
   pixels.setPixelColor(i-STRING_LENGTH15, pixels.Color(50,0,170));
   pixels.setPixelColor(i-STRING_LENGTH16, pixels.Color(75,0,120));
   pixels.setPixelColor(i-STRING_LENGTH17, pixels.Color(130,40,160));
   pixels.setPixelColor(i-STRING_LENGTH18, pixels.Color(190,85,100));
   pixels.setPixelColor(i-STRING_LENGTH19, pixels.Color(238,20,20));
   pixels.show(); // This sends the updated pixel color to the hardware.
   delay(delayval); 
   i = (i+1) % (NUMPIXELS + STRING_LENGTH);
 }
}