JSFiddle - React, Tailwind, and code Playground

by Humphry Huang

CSS

body { position:relative; height:100% ; background:#000; overflow:hidden; }
html { height: 100%; }
div { width : 4px; height : 4px; border-radius : 100%; position : absolute; }

JavaScript

var NUM = 500,
            THRESHOLDNUM = 60;

        // returns any random digits you need
        // gets a reasonable random() calling frequency
        var rands = (function(i) {
            var obj = {
                getRandomDigit: function() {
                    if (!(this.rands && this.rands.length > 0)) {
                        this.rands = Math.random().toString().substr(2).split("");
                    }
                    return this.rands.shift();
                },
                getRandomDigits: function(requireNumbers) {
                    var str = "",
                        n = requireNumbers;
                    while (n > 0) {
                        str += this.getRandomDigit();
                        n--;
                    }
                    return str;
                }
            };
            var cur = 0;
            var str = obj.getRandomDigits(i);
            return function(needs) {
                cur += needs;
                if (cur > i) {
                    // str = null ;
                    str = obj.getRandomDigits(i);
                    cur = needs;
                }
                return str.substr(cur - needs, needs);
            };
        })(THRESHOLDNUM);

        // requestAnimationFrame shim
        var vandors = ["ms","moz","webkit","o"];
        var i = vandors.length;
        while (--i > -1 && !_reqAnimFrame) {
          var _reqAnimFrame = window[vandors[i] + "RequestAnimationFrame"];
          var _cancelAnimFrame = window[vandors[i] + "CancelAnimationFrame"] || window[vandors[i] + "CancelRequestAnimationFrame"];
        }

        // creates enough divs
        var htmls = [];
        for (i = 0; i < NUM; i++) {
            var a = document.createElement("div");
            a.style.backgroundColor = "rgb(" + rands(2) + "%," + rands(2) + "%," + rands(2) + "%)";
            htmls.push(a.outerHTML);
        }
        document.body.innerHTML = htmls.join("");
        var allnodes =...