JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <script src="jquery-1.11.0.js"></script>
    <script src="main.js"></script>
    <link rel="stylesheet" href="style.css"/>
</head>
<body>

<table>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
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    <td></td>
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    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
</tr>
<tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
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    <td></td>
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</tr>
<tr>
    <td></td>
   ...

CSS

* {
    padding: 0;
    margin: 0;
}

body {
    background: #d5d5d5;
}

table {
    border: 1px solid black;
    margin: 0 auto;
    border-collapse: collapse;
}

td {
    width: 30px;
    height: 30px;
    border:1px solid gray;
}

JavaScript

$(document).ready(
    function()
    {
        var x = $("table tr:first-child>td").length;
        var y = $("tr").length;

        var field = [y];
        for(var i=0; i<y;i++)
        {
            field[i]=[x];
            var ii = i+1;
            var row = $("table tr:nth-child("+ii+") td");

            for(var j =0; j<x; j++)
            {
                field[i][j]=row[j];
                $(field[i][j]).css("background","#f9f9f9");
            }
        }

        var getHex = function(rgb)
        {
            console.log(rgb);
            var regex = /(\d{3})/g;
            var value = rgb.match(regex);
            console.log(value);
            var result = "#"+parseInt(value[0]).toString(16)+parseInt(value[1]).toString(16)+parseInt(value[2]).toString(16);
            console.log(result);
            return result;
        }

        function Figure(figure,field)
        {
            this.active=true;
            this.moveOrNot=true;
            this.field=field;
            this.position=[];
            this.lastPosition=[[0,0],[0,0],[0,0],[0,0]];
            this.currentPosition=[[0,0],[0,0],[0,0],[0,0]];
            this.figure=figure;
            this.color;
            switch(this.figure)
            {
                case "-":
                    this.position=[[0,0],[0,1],[0,1],[0,1]];
                    this.color="red";
                    break;
                case "r":
                    this.position=[[0,0],[1,0],[1,0],[0,1]];
                    this.color="blue";
                    break;
                case "z":
                    this.position=[[0,0],[0,1],[1,0],[0,1]];
                    this.color="green";
                    break;
                case "o":
                    this.position=[[0,0],[0,1],[-1,0],[0,-1]];
                    this.color="yellow";
            }
        }
        Figure.prototype.x=0;
        Figure.prototype.y=0;
        Figure.prototype.xx=0;
        Figure.prototype.yy=0;

       ...