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#div148{
height:75px;
width:150px;
background-color:green;
border:2px solid black;
}
/* All margins are 5px */
#div149{
height:75px;
width:150px;
background-color:orange;
border:2px solid black;
}
/* If you set four values the order is top, right, bottom, left, so the top margin in 20px and right is 5px etc */