canvas1

<!DOCTYPE html>
<html>
<head><title>MyTitle</title>
<head>
<body>
<center>
<canvas id="myCanvas" width="300" height="300" style="border:1px solid green;">
Your browser does not support HTML5
</canvas>
<br/>
Green-Leaf
</center>
<script>
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle="#FF0000";
ctx.fillRect(0,0,100,100);
</script>

<script>
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle="#FF0000";
ctx.fillRect(200,0,100,100);
</script>

<script>
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle="#00FF00";
ctx.fillRect(100,100,100,100);
</script>



<script>
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle="#0000FF";
ctx.fillRect(0,200,100,100);
</script>

<script>
var c=document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.fillStyle="#0000FF";
ctx.fillRect(200,200,100,100);
</script>

</body>
</html>