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#div297{
width:170px;
height:150px;
border:2px solid black;
}
#div298{
margin:0 auto;
width:100px;
height:100px;
background-color:red;
transform: rotateX(45deg);
}
#div299{
width:170px;
height:150px;
border:2px solid black;
}
#div300{
margin:0 auto;
width:100px;
height:100px;
background-color:red;
transform: rotateX(45deg);
}