Patternflow

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Patternflow sandbox</title>
<style>
  html, body { margin: 0; height: 100%; background: transparent; overflow: hidden; }
  canvas {
    display: block;
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    object-fit: contain;
  }
</style>
</head>
<body>
<canvas id="screen" width="128" height="64"></canvas>
<script>
/*__SANDBOX_SCRIPT__*/
</script>
</body>
</html>