canvas example

canvas.html

<style>
    #myCanvas{
        width: 100%;
        height: 100%;
    }
</style>
<canvas id="myCanvas"></canvas>
<script>
    var c = document.getElementById("myCanvas");
    var ctx = c.getContext("2d");
    ctx.moveTo(0, 0);
    ctx.lineTo(200, 100);
    ctx.stroke();
</script>