DEMO Of How To Add Scripts Or Codes In Blogger Posts

You can add any code here like :

.post blockquote {
margin : 10px;
padding : 10px;
clear : both;
font-family : "Courier New", "MS Sans Serif", sans-serif, serif;
background: #fff;
border : 2px dotted #000;
}
.post blockquote p {
margin: 0;
padding: 0 0 15px;
}