xx = html`
<div style="padding: 10px 10px;">
<button onclick="mover()">▶</button>
<button onclick="parar()">⏸</button>
</div>
<div>
<canvas id="myCanvas" width="640" height="480" style="border:1px solid #d3d3d3; margin: 10px;"></canvas>
</div>
<div>
Vertex array <input></input> <br>
Model Matrix <input value='1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1'></input>
</div>
`