.b0, .b1, .b2, .b3, .b4{font-size:1px; overflow:hidden; display:block;}
    .b0 {height:5px; background-color:#666;}
    .b1 {height:1px; background-color:transparent; border-right:4px solid #666; border-left:4px solid #666; margin:0 0px;}
    .b2 {height:1px; background-color:transparent; border-right:2px solid #666; border-left:2px solid #666; margin:0 0px;}
    .b3 {height:2px; background-color:transparent; border-right:1px solid #666; border-left:1px solid #666; margin:0 0px;}
    .b4 {height:2px; background-color:transparent; border-right:0px solid #666; border-left:0px solid #666; margin:0 0px;}