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To enable transparent layer for a PNG image in GIMP, you need to add the Alpha Channel to that image: >> Layer (menu) >> Transparency >> Add Alpha Channel Move created layer to below the image and you can adjust, delete or modify parts of the original image to show the transparent background.

To add background image rotation for your website, use the following jquery and css snippet: CSS: body { transition: background 1s ease-in-out; -webkit-transition: background 1s ease-in-out; -moz-transition: background 1s ease-in-out; -o-transition: background 1s ease-in-out; } .image-0 { background:url('/images/bgmain.png'); } .image-1 { background:url('/images/bgmain1.png'); } .image-2 { background:url('/images/bgmain2.png'); } .image-3 { background:url('/images/bgmain3.png'); } JS:     <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>     <script> $(document).ready(function(){ var msecs = 5000; var step = 0; var limit = 2; $("body").addClass("image-"+step); setInterval (function(){ $("body").removeClass("image-"+step); step = (step > limit) ? 0 : step +...