title: put background image in center and repeat last pixel to left and right
body: <p>i want to put my background image in the center and repeat only the last left pixelcolumn to the left and the same for the right and the last pixelrow down. 
  so that if you zoom out you see this</p>
  
  <pre><code>                 --------------   repeat last pixel of the right of the picture to the right  
                   |            |
                   |            | 
                   --------------      
                   ^ 
                   |
                   here repeat to the left the first pixels  to the left
  </code></pre>
  
  <p>and below the picture the lowest row of pixels repeat down.</p>
  
  <p>i hope you understand what i mean... </p>
  
  <p>minke</p>