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<style type="text/css">
canvas { position:absolute;
z-index:-1;
top:0px;
left:100px;
}

.wrapper{ height:100%;
width:100%;
}

.username { position:absolute;
top:200px;
left:150px;
visibility:hidden;
z-index:1;
}

.password { position:absolute;
top:300px;
left:150px;
visibility:hidden;
z-index:2;
}

</style>

</head>
    <body>
            <div id="wrapper">
                <canvas id = "gamescreen" height = "800" width = "800"></canvas>
                <input type="text" name="username" id="username" />
                <input type="password" name="password" id="password" />
            </div>
    </body>