I need help with my index.php bg

[iDevon]

Well, I want to change the bg to my own bg but I have no idea can somebody help me?

 

[Deion]

Replace your BG in the images thingy with another bg you want to use, If I'm Correct, And it is mostly gonna be .PNG file so I'd look for a .png bg.

 

[Markshall]

This is CSS:

<style type="text/css">
body {
    background-image: url("linktoimage.png");
}
</style>