My First CSS

I am newbie on CSS so I will try with small one
Today is background

For all
background-repeat: repeat

For vertical
background-repeat: repeat-y

For horizontal
background-repeat: repeat-x

For position with precentage;
background-repeat: no-repeat;
background-attachment:fixed;
background-position: 30% 20%;

For center position
background-repeat:no-repeat;
background-attachment:fixed;
background-position:center;

For not scrolling
background-image:
url(’smiley.gif’);
background-repeat:
no-repeat;
background-attachment:
fixed

Illustration

Illustration of CSS for background