Preview: Resources

CSS:

body {
    background-image: url('https://designfreaks.net/uploads/resources/patterns/patterns_134baa612a_0.png');
    background-repeat: repeat;
    background-size: auto;
    background-position: bottom;
}

For testing purposes, you can use the pattern with the URL provided. However, please upload it to your own server or an image host like Imgur or DirectUpload to avoid hotlinking.