d1 width 100px height 100px position relative background-color green m

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#d1
{
width:100px;
height:100px;
position:relative;
background-color:green;
margin: 50px auto 0px;
}
.bt1{
margin-top: 10px;
margin-left: 47%;
float: left;
}
.bt2{
margin-top: 10px;
margin-left: 1%;
}