Untitled

<!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 = 10;
var x = 10;
var number = 1;

for (var i = 0; i <=10; i++) {
  if (number % 3 === 0) {
context.fillStyle = 'blue';
context.fillRect(y,x,30,30);
  }else if (number % 5 === 0) {
    context.fillStyle = 'yellow';
    context.fillRect(y,x,30,30);
  }else if(number % 5 === 0 && number % 3 == 0){
    context.fillStyle = 'green';
    context.fillRect(y,x,50,50);
  }else {
    context.fillStyle = 'grey';
    context.fillRect(y,x,30,30);
  }
 y = y+25;
 x = x+25;
 number = number + 1;
}
</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 = 10;
var x = 10;
var number = 1;

for (var i = 0; i <=10; i++) {
  if (number % 3 === 0) {
context.fillStyle = 'blue';
context.fillRect(y,x,30,30);
  }else if (number % 5 === 0) {
    context.fillStyle = 'yellow';
    context.fillRect(y,x,30,30);
  }else if(number % 5 === 0 && number % 3 == 0){
    context.fillStyle = 'green';
    context.fillRect(y,x,50,50);
  }else {
    context.fillStyle = 'grey';
    context.fillRect(y,x,30,30);
  }
 y = y+25;
 x = x+25;
 number = number + 1;
}</script></body>
</html>