Cycles through animations of random colors on my NeoPixel board. Uses the Adafruit NeoPixel library

NeoPixel.Matrix.Wipes.ino

#include <Adafruit_NeoPixel.h>

#define PIN 4

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)

Adafruit_NeoPixel strip = Adafruit_NeoPixel(49, PIN, NEO_GRB + NEO_KHZ800);
uint32_t randomColor;

// Declare the matrix as a mutlidimensional array in order,
// since it's wired sequentially 
int matrix[7][7] = { 
  { 0,  1,  2,  3,  4,  5,  6}, 
  {13, 12, 11, 10,  9,  8,  7}, 
  {14, 15, 16, 17, 18, 19, 20}, 
  {27, 26, 25, 24, 23, 22, 21}, 
  {28, 29, 30, 31, 32, 33, 34}, 
  {41, 40, 39, 38, 37, 36, 35}, 
  {42, 43, 44, 45, 46, 47, 48}
};

void setup() {
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  strip.setBrightness(254);
}

void loop() {

// 7 x 7 Grid
  int wipeDelay = 50;
  
  for (int loops = 0; loops < 50; loops++) {
    
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    // 'Maximize effect'
    for (int i = 0; i < 7; i++) {
      for (int j = 0; j <= i; j++) {
        strip.setPixelColor(matrix[i][j], randomColor);
        strip.setPixelColor(matrix[j][i], randomColor);
        strip.show();
      } 
      
      delay(500 / (loops + 1));
    }
  }
  
  delay(1000);
  

  // Flash alternating rows with alternating colors
  for (int loops = 0; loops < 20; loops++) {
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 0; i < 7; i += 2) { //Every other row
      wipeRow(i, randomColor, 0);
    }
    
    delay(100);
    
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 1; i < 7; i += 2) {
      wipeRow(i, randomColor, 0); 
    }
    
    delay(100);
  }

  // Wipe the board once from every direction with a random color
  for (int rowColDelay = 10; rowColDelay <= 15; rowColDelay++) { 
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 0; i < 7; i++) {
      wipeCol(i, randomColor, rowColDelay);
      delay(wipeDelay);
    }
    
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 0; i < 7; i++) {
      wipeRow(i, randomColor, rowColDelay);
      delay(wipeDelay);
    }
    
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 6; i >= 0; i--) {
      wipeCol(i, randomColor, rowColDelay);
      delay(wipeDelay);
    }
    
    randomColor = strip.Color(random(32,254), random(32,254), random(32,254));
    
    for (int i = 6; i >= 0; i--) {
      wipeRow(i, randomColor, rowColDelay);
      delay(wipeDelay);
    }
  }
}

void wipeCol(int col, uint32_t color, int wipeDelay) {
  for (int i = 0; i < 7; i++) {
    int pixelToLightUp = matrix[i][col];
    
    strip.setPixelColor(pixelToLightUp, color);
    strip.show();
    delay(wipeDelay);
  }
}

void wipeRow(int row, uint32_t color, int wipeDelay) {
  for (int i = 0; i < 7; i++) {
    int pixelToLightUp = matrix[row][i];
    
    strip.setPixelColor(pixelToLightUp, color);
    strip.show();
    delay(wipeDelay);
  }
}