#include <Adafruit_NeoPixel.h>

#define LED_PIN   6  
#define NUM_LEDS 16
int spin=0;
int i= 0;
int randNumber = random(0,16);
int pos;
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);



void setup() {
  
strip.begin();
  
}

void loop() {

roulette(strip.Color(250,0,0),strip.Color(0,250,0),strip.Color(0,0,250));

 
} /*****************END VOID*******************/


void roulette(uint32_t c, uint32_t d, uint32_t e)
{
float wait = 20.0; 

if (spin <20 ) {
  colorWipe(c,d,e, wait);
}

else  
if (spin>20) {
for ( int i = 0; i <(16*6)+randNumber; i++)
{
 colorWipe(c,d,e, wait);
wait = (wait * 2.046);

}
}
}


/*
void advanceOne(uint32_t c,uint32_t d,uint32_t e, float wait) {


                clr();//Clear the display

                  if ((pos & 0x01) == 0) {    //check to see if position is an even number
                        strip.setPixelColor(pos, c); //turn on the pixel at position 'pos'
                   } else  //else it is odd
                     {strip.setPixelColor(pos, d);
                   }

                  if (pos == 0) { //or check to see if it is '0'
                     strip.setPixelColor(pos, e);
                   }

                strip.show(); 
                delay(wait);

                if (dir){    //if direction var is set to clockwise
                      pos--;  //decrement the position
                      if(pos<0)  {pos=15;}  //resets running count if < 0}
                }
                    else{
                      pos++;  //increment the position
                      if(pos>15)  {pos=0;}  //resets running count if > 15}
                }

    }//end advanceOne function


//clears the display
    void clr(){
      for(uint16_t i=0; i<strip.numPixels(); i++) {
        strip.setPixelColor(i, 0);
        strip.show();
      } 
    }


*/



void colorWipe(uint32_t c, uint32_t d, uint32_t e, float wait) {
for(i=0; i<=strip.numPixels(); i++) {
strip.setPixelColor(i, d);
strip.setPixelColor(i-1, 0);
if(i==16) strip.setPixelColor(15, (0,0,0));
strip.show();
delay(wait);
spin++;
}
}