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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Practice JavaScript by drawing</title>
</head>
<body>
  <canvas id="myCanvas" height="300" width="450" style="border: 1px solid black"></canvas>
<script id="jsbin-javascript">
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');

var cH = canvas.height;
var cW = canvas.width;

var y = 5;
var x = 5;
var line = 1;

for (var k = 1; k <=5; k++) {

for (var i = 1; i <=line; i++) {
  context.fillStyle = 'orange';
  context.fillRect(y,x,50,50);
  y = y +55;
}
line++;
y = 5;
x = x + 55;
}
</script>


<script id="jsbin-source-javascript" type="text/javascript">var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');

var cH = canvas.height;
var cW = canvas.width;

var y = 5;
var x = 5;
var line = 1;

for (var k = 1; k <=5; k++) {

for (var i = 1; i <=line; i++) {
  context.fillStyle = 'orange';
  context.fillRect(y,x,50,50);
  y = y +55;
}
line++;
y = 5;
x = x + 55;
}

</script></body>
</html>