JavaScript must be used to draw the graphics actually.

Canvas has many methods for drawing boxes, circles, text, paths, adding images.

Canvas markup is defined as follows - 

<canvas id="testCanvas" width="200" height="100"></canvas>

Now using javascript following scripts show how to draw a circle - 

var c = document.getElementById("testCanvas");

var cx = c.getContext("2d");

cx.beginPath();

cx.arc(95, 50, 40, 0, 2 * Math.PI);

cx.stroke();

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