SEU TUTORIAL

<b:if cond='data:blog.pageType == "item"'>
<div id='related-posts'>
<b:loop values='data:post.labels' var='label'>
<b:if cond='data:label.isLast != "true"'>
</b:if>
<script expr:src='"/feeds/posts/default/-/" + data:label.name + "?alt=json-in-script&callback=related_results_labels_thumbs&max-results=6"' type='text/javascript'/></b:loop>
<script type='text/javascript'>
removeRelatedDuplicates_thumbs();
printRelatedLabels_thumbs("<data:post.url/>");
</script>
</div><div style='clear:both'/>
</b:if>
<b:if cond='data:blog.url == data:blog.homepageUrl'><b:if cond='data:post.isFirstPost'>
</b:if></b:if>

See the Pen DAeqz by Seu Tutorial (@marcelost) on CodePen

<script type='text/javascript'>
var defaultnoimage="http://i56.tinypic.com/1zwotms.png";
<b style="color: red;">var maxresults=5</b>;
var splittercolor="#d4eaf2";
var relatedpoststitle="Artigos Relacionados: ";
</script>
<script src='http://blogergadgets.googlecode.com/files/related-posts-with-thumbnails-for-blogger-pro.js' type='text/javascript'/>

See the Pen jCdwz by Seu Tutorial (@marcelost) on CodePen

#related-posts {
text-transform:none;
height:100%;
min-height:100%;
padding-top:5px;
padding-left:5px;
width:  /* largura do widget */
}
#related-posts h2{
font-size: 1.6em;
font-weight: bold;
color: black;
font-family: Georgia, “Times New Roman”, Times, serif;
margin-bottom: 0.75em;
margin-top: 0em;
padding-top: 0em;
}
#related-posts a{
color:black;
background-color:#FFF; /* cor de fundo do widget */
border:solid 1px #333; /* dimensão e cor da borda do widget */
padding:0 8px;
width:100px;
}
#related-posts a:hover{
color:#fff;
}
#related-posts a:hover {
background-color:#333;  /* cor de fundo do widget ao passar o mouse*/
border:solid 1px #FFF; /* dimensão e cor da borda do widget com mouse*/
}

See the Pen akHzG by Seu Tutorial (@marcelost) on CodePen