//sketch fills a led stick with pattern defined in array pattern and move it left to right

#include <Adafruit_NeoPixel.h>

#define ledPin A0
#define ledCount 8

Adafruit_NeoPixel strip(ledCount, ledPin, NEO_GRB + NEO_KHZ800);

//declararion of pattern colors
uint32_t red = strip.Color(255, 0, 0);
uint32_t green = strip.Color(0, 255, 0);
uint32_t blue = strip.Color(0, 0, 255);
uint32_t magenta = strip.Color(255, 0, 255);
uint32_t black = strip.Color(0, 0, 0);
uint32_t white = strip.Color(255, 255, 255);
uint32_t pattern[] = {red, red, blue, blue};
int patCnt = 4;                                 //length of pattern array

void setup() {
  //activating led stick
  strip.begin();
  strip.show();
  strip.setBrightness(100);  //setup a brightness
}

void loop() {
  //clearing strick and call pattern moove function
  //
  strip.clear();
  patternMoove(pattern, 150);
}

//the function fills stick with the pattern pat[]
//the parameter wait describes a delay between changes of frames
void patternMoove(uint32_t pat[], int wait) {

  //declaration and creation of working pattern array
  uint32_t patternCopy[patCnt]; 

  for (int patId=0; patId<patCnt; patId++) {
    patternCopy[patId] = pattern[patId];
  }


  for (int i = 0; i < patCnt; i++) {

    //filling stick with pattern
    int m = 0;
    for (int n = 0; n < ledCount; n++) {
      strip.setPixelColor(n, patternCopy[m]);
      m++;
      if (m==patCnt) {        
        m=0;
      }
    }

    //showing current stick pattern
    strip.show();
    delay(wait); 

    //change the pattern, first becomes second, second third and last color becomes first
    uint32_t tempCol = patternCopy[patCnt-1];
    for (int cnt=patCnt-1; cnt>0; cnt--) {
      patternCopy[cnt]=patternCopy[cnt-1];
    }
    patternCopy[0]=tempCol;
  }
}