​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>HTML5 Canvas</h1>
​
<canvas id="myCanvas" width="200" height="100" style="border:1px solid grey;"></canvas>
​
<script>
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");
​
ctx.fillStyle = "#FF0000";
ctx.fillRect(0,0,150,75);
</script>
​
</body>
</html>
​