CSS Box Model Padding

The CSS Box Model
http://www.w3schools.com/css/css_boxmodel.asp

CSS Padding
http://www.w3schools.com/css/css_padding.asp
Example
padding-top:25px;
padding-bottom:25px;
padding-right:50px;
padding-left:50px;

    padding:25px 50px 75px 100px;
        top padding is 25px
        right padding is 50px
        bottom padding is 75px
        left padding is 100px

    padding:25px 50px 75px;
        top padding is 25px
        right and left paddings are 50px
        bottom padding is 75px

    padding:25px 50px;
        top and bottom paddings are 25px
        right and left paddings are 50px

    padding:25px;
        all four paddings are 25px