Hi, Try like this

• background-image: url(http://thisisanimage.jpg);

More to know about Thimble CSS Cheat Sheet

• https://bethnewhouse.makes.org/thimble/css-cheatsheet

Sorry, I didn't give clearly my problem, am I?

<style>

     body {
       background-image: url(http://takeinsocialmedia.com/wp-content/uploads/2014/04/norway-mountain-river-images-photos-0321205905.jpg);
       background-size: 100%;
       background-position: center;
       background-repeat: no-repeat;
       background-attachment: scroll;
       margin: 0;
       padding: 0;
       font-family: Tahoma, Arial
     }

</style>

I checked, the problem with the image size.

I changed the image url and its worked fine, here for your reference

<style>

    body {

background-image:url(http://farm3.staticflickr.com/2509/4347593358_0f61b650bf_o.jpg);

      background-size: 100%;
      background-position: center;
      background-repeat: no-repeat;
      background-attachment: scroll;
      margin: 0;
      padding: 0;
      font-family: Tahoma, Arial
    }

</style>

Oh, that's weird. You're right, right after I change the link it turn out working after few minutes. Thanks a lot :)

BTW, can I ask you once more question? It's about margin selector. Normally, if I put and "auto" value into "margin" it suppose to be center right? But in this code it won't (I never see this sintulation before)

<style>

     main {
       background: rgba(0,0,0,.4);
       position: absolute;
       margin: 20px auto;
       padding: 5px;
       width: 1000px
     }

</style>

Welcome. You can ask "N" number of Questions.

Try with div. Even I can't figure it out the issue, but I'll get back to you ASAP. Sorry :(

See http://dorward.me.uk/www/centre/

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@iamjayakumars: Thanks :) I will try it.

@cor-el: I don't think problem at cache. :)

Could you try this Start Light

<style>

    main {
      background: rgba(0,0,0,.4);
    position: relative;
    display: block;
      margin: 20px auto;
      padding: 5px;
      width: 1000px
    }

</style>

I had used your code and... It does working but... New problem has been appeared: https://www.facebook.com/photo.php?fbid=247657238751427

<main> tag should cover post (<article> tag) but it seem like... uhm, it isn't working as I expected. I also try change position for <article>, and here is problem: https://www.facebook.com/photo.php?fbid=247667368750414

I'm sorry for trouble you so much :'(