多个随机图像在让它雪地插件

我一直在玩Jason Brown的Let It Snow插件。他的代码只能容纳单个自定义图像，我一直在尝试弄清楚如何更改代码，以便它在随机范围内容纳多个自定义图像。

!function($){  
var defaults = {
speed: 0,
interaction: true,
size: 2,
count: 200,
opacity: 0,
color: "#ffffff",
windPower: 0,
image: false
};
  $.fn.let_it_snow = function(options){
var settings = $.extend({}, defaults, options),
    el = $(this),
    flakes = [],
    canvas = el.get(0),
    ctx = canvas.getContext("2d"),
    flakeCount = settings.count,
    mX = -100,
    mY = -100;
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
(function() {
    var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame ||
    function(callback) {
        window.setTimeout(callback, 1000 / 60);
    };
    window.requestAnimationFrame = requestAnimationFrame;
})();
function snow() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    for (var i = 0; i < flakeCount; i++) {
        var flake = flakes[i],
            x = mX,
            y = mY,
            minDist = 100,
            x2 = flake.x,
            y2 = flake.y;
        var dist = Math.sqrt((x2 - x) * (x2 - x) + (y2 - y) * (y2 - y)),
            dx = x2 - x,
            dy = y2 - y;
        if (dist < minDist) {
            var force = minDist / (dist * dist),
                xcomp = (x - x2) / dist,
                ycomp = (y - y2) / dist,
                deltaV = force / 2;
            flake.velX -= deltaV * xcomp;
            flake.velY -= deltaV * ycomp;
        } else {
            flake.velX *= .98;
            if (flake.velY <= flake.speed) {
                flake.velY = flake.speed
            }
            switch (settings.windPower) { 
              case false:
                flake.velX += Math.cos(flake.step += .05) * flake.stepSize;
              break;
              case 0:
                flake.velX += Math.cos(flake.step += .05) * flake.stepSize;
              break;
              default: 
                flake.velX += 0.01 + (settings.windPower/100);
            }
        }
        var s = settings.color;
        var patt = /^#(['da-fA-F]{2})(['da-fA-F]{2})(['da-fA-F]{2})$/;
        var matches = patt.exec(s);
        var rgb = parseInt(matches[1], 16)+","+parseInt(matches[2], 16)+","+parseInt(matches[3], 16);

        flake.y += flake.velY;
        flake.x += flake.velX;
        if (flake.y >= canvas.height || flake.y <= 0) {
            reset(flake);
        }

        if (flake.x >= canvas.width || flake.x <= 0) {
            reset(flake);
        }
        if (settings.image == false) {
          ctx.fillStyle = "rgba(" + rgb + "," + flake.opacity + ")"
          ctx.beginPath();
          ctx.arc(flake.x, flake.y, flake.size, 0, Math.PI * 2);
          ctx.fill();
        } else {
          ctx.drawImage($("img#lis_flake").get(0), flake.x, flake.y, flake.size * 2, flake.size * 2);
        }
    }
    requestAnimationFrame(snow);
};

function reset(flake) {
    if (settings.windPower == false || settings.windPower == 0) {
      flake.x = Math.floor(Math.random() * canvas.width);
      flake.y = 0;
    } else {
      if (settings.windPower > 0) {
        var xarray = Array(Math.floor(Math.random() * canvas.width), 0);
        var yarray = Array(0, Math.floor(Math.random() * canvas.height))
        var allarray = Array(xarray, yarray)
        var selected_array = allarray[Math.floor(Math.random()*allarray.length)];
         flake.x = selected_array[0];
         flake.y = selected_array[1];
      } else {
        var xarray = Array(Math.floor(Math.random() * canvas.width),0);
        var yarray = Array(canvas.width, Math.floor(Math.random() * canvas.height))
        var allarray = Array(xarray, yarray)
        var selected_array = allarray[Math.floor(Math.random()*allarray.length)];
         flake.x = selected_array[0];
         flake.y = selected_array[1];
      }
    }
    flake.size = (Math.random() * 3) + settings.size;
    flake.speed = (Math.random() * 1) + settings.speed;
    flake.velY = flake.speed;
    flake.velX = 0;
    flake.opacity = (Math.random() * 0.5) + settings.opacity;
}
 function init() {
  for (var i = 0; i < flakeCount; i++) {
      var x = Math.floor(Math.random() * canvas.width),
          y = Math.floor(Math.random() * canvas.height),
          size = (Math.random() * 3)  + settings.size,
          speed = (Math.random() * 1) + settings.speed,
          opacity = (Math.random() * 0.5) + settings.opacity;
      flakes.push({
          speed: speed,
          velY: speed,
          velX: 0,
          x: x,
          y: y,
          size: size,
          stepSize: (Math.random()) / 30,
          step: 0,
          angle: 180,
          opacity: opacity
      });
  }
  snow();
}
if (settings.image != false) {
  $("<img src='"+settings.image+"' style='display: none' id='lis_flake'>").prependTo("body")
}
init();
$(window).resize(function() {
  if(this.resizeTO) clearTimeout(this.resizeTO);
  this.resizeTO = setTimeout(function() {
    el2 = el.clone();
    el2.insertAfter(el);
    el.remove();
    el2.let_it_snow(settings);
  }, 200);
});
if (settings.interaction == true) {
  canvas.addEventListener("mousemove", function(e) {
      mX = e.clientX,
      mY = e.clientY
  });
}}}(window.jQuery);

代码顶部的"默认属性"中，是指向图像 URL 的位置。 下面是我输入的内容，因此它在 image1.jpeg 和 image2 之间进行选择.jpeg

image: "img/image'+Math.floor((Math.random() * 2) + 1)+'.jpeg";

但是，当"雪花"重生时，图像保持不变，而不是再次选择随机数。 我必须更改什么才能在创建雪花时选择一个随机图像并成为它？

我希望我的问题很清楚，如果您需要更清楚，请告诉我。 我是 J-script 的新手，任何帮助将不胜感激。