The background-position property is used specify the top and the left of the background image relative to the top and the left of the element box.
The possible values are.
| Properties | Description | 
|---|
| <percentage> |  | 
| <length> |  | 
| left|center|right | for horizontal direction | 
| top|center|bottom | for vertical direction | 
For example
background-position : 30px 50px    /* first value applies to horizontal direction,  
second value apply to vertical direction*/
background-position : left bottom
background-position : 10%    /* applies to both the vertical and horizontal direction.*/ 
snippet
<html>
<head>
    <style>
        p {margin: 10px}
        body * {background-image: url(bg.jpg)}
    </style>
</head>
<body style="background-image: url(image.png);background-position: 0px">
    <p style="background-position: 0px"> Say it before it's too late.</p>
    <p style="background-position: 10px"> Say it before it's too late.</p>
    <p style="background-position: -10px 10%"> Say it before it's too late.</p>
    <p style="background-position: 6% -6%"> Say it before it's too late.</p>
    <p style="background-position: 6cm"> Say it before it's too late.</p>
</body>
</html>