# Zalūzija

## In this example below you will see how to do a Zalūzija with some HTML / CSS and JavascriptForked from Brandel Zachernuk's Pen CSS-only rotating checkerboard moire effect

This awesome code was written by cathbailh, you can see more from this user in the personal repository.
You can find the original code on Codepen.io

#### Technologies

• HTML
• JavaScript
``````<!DOCTYPE html>
<html lang="en" >

<meta charset="UTF-8">
<title>Zalūzija</title>

<body>

<div/>
<div id="rotator"> </div>
<canvas id="canv" width="32" height="32">

<script  src="js/index.js"></script>

</body>

</html>
``````
``````
var c = document.getElementById('canv');
var \$ = c.getContext('2d');

var col = function(x, y, r, g, b) {
\$.fillStyle = "rgb(" + r + "," + g + "," + b + ")";
\$.fillRect(x, y, 1,1);
}
var R = function(x, y, t) {
return( Math.floor(172 + 64*Math.cos( (x*x-y*y)/70 + t )) );
}

var G = function(x, y, t) {
return( Math.floor(192 + 64*Math.sin( (x*x*Math.cos(t/4)+y*y*Math.sin(t/3))/300 ) ) );
}

var B = function(x, y, t) {
return( Math.floor(192 + 64*Math.sin( 5*Math.sin(t/9) + ((x-100)*(x-100)+(y-100)*(y-100))/1100) ));
}

var t = 0;

var run = function() {
for(x=0;x<=35;x++) {
for(y=0;y<=35;y++) {
col(x, y, R(x,y,t), G(x,y,t), B(x,y,t));
}
}
t = t + 0.120;
window.requestAnimationFrame(run);
}

run();
``````