CodePen

HTML

            
              	


<div id="thewindow">
  <div id="background_blackboards">


</div><!-- END div id blackboard   --> 
 
</div><!-- END div id window  --> 
 

            
          
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CSS

            
              
#thewindow{
            width: 960px;
            margin: 0 auto ;
			
	}
	
	
#background_blackboards{
	margin-top:65px;
	width:950px;
	height:460px;
	 background: url("http://www.babysitter-agency.com/images/blackboard.png")scroll 0 0 transparent ;	 
		 
	}


            
          
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JavaScript

            
              
            
          
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999px
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