demo

.post blockquote {

background: #C8EFFF url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_42YL82SLv88_FFeWfEE5mElBzVOw6PI_bswa2qRvde5zBugz_gSN31zbl_Nlfgnuypqx0OA76UpmkH3yP_SxTghR7A7j0rr0fcUIXqnT8cto29quI0ImLyJ0s53l67pxHs-21KXv0ck/s1600/1.png);

background-position:top left;

background-repeat:repeat-y;

margin: 0 20px;

padding: 10px 20px 10px 45px;

border-top: 2px solid #DDD;

border-right: 5px solid #666;

border-left: 2px solid #DDD;

border-bottom: 5px solid #666;

font-size: 0.9em;

}

.post blockquote p {

margin: 0;

padding: 0 0 15px;

}

.blockquote {

font: 18px normal  sans-serif,Tahoma;

padding-top: 10px;

margin: 5px;

text-indent: 65px;

}

.blockquote div {

display: block;

padding-bottom:10px;

}

.blockquote p {

margin: 0;

padding-top:10px;

}