<!DOCTYPE html>
<canvas></canvas>
<script>
var canvas = document.querySelector("canvas");
var context = canvas.getContext("2d");
context.fillRect(0, 0, 40, 10);
</script>
<!DOCTYPE html>
<canvas></canvas>
<script>
var canvas = document.querySelector("canvas");
var context = canvas.getContext("2d");
context.fillRect(0, 0, 40, 10);
</script>