fun things with canvas in html\ code example
Example 1: javascript create canvas
var canvas = document.createElement("canvas"); //Create canvas
document.body.appendChild(canvas); //Add it as a child of <body>
Example 2: canvas in javascript
<!DOCTYPE HTML>
<html>
<head>
<style>
#mycanvas{border:1px solid red;}
</style>
</head>
<body>
<canvas id = "mycanvas" width = "100" height = "100"></canvas>
</body>
</html>