it is the example, you can make it in your blog, and this tutorial not make your blog heavy because this tutorial used CSS.
You can follow this tutorial:
=> Login to your Blog, go to HTML edit, check Expand widget template.
=> Search code ]]></b:skin> in tour template.
=> Paste this code above code ]]></b:skin>.
a.comment-bubble:hover{color:#cc6611;}a.comment-bubble {float:right;width:34px;height:18px;text-align: center;white-space:nowrap;font: bold 14px monospace;color:white;position:relative;margin-left: 6px;margin-top: 3px;padding-top:2px;background:#eeaa00; /* fallback */background:-webkit-gradient(linear, 0 0, 0 100%, from(#f8dd99), to(#eeaa00));background:-webkit-linear-gradient(#f8dd99, #eeaa00);background:-moz-linear-gradient(#f8dd99, #eeaa00);background:-o-linear-gradient(#f8dd99, #eeaa00);background:linear-gradient(#f8dd99, #eeaa00);-webkit-border-radius:6px;-moz-border-radius:6px;border-radius:6px;border: 1px solid #dd8808;border-bottom-color: #f8dd99;border-right-color: #f8dd99;}a.comment-bubble:after {content:"";position:absolute;bottom:-5px;left:11px;border-width:5px 5px 0px 0px;border-style:solid;border-color:#eeaa00 transparent;display:block;width:0;}
=> Search your blog title code in your template, usually it shame like this code:
<b:includable id='post' var='post'><div class='post hentry'><a expr:name='data:post.id'/><b:if cond='data:post.title'><h3 class='post-title entry-title'>
NB: if your title template not used h3, you can search h3 become h2 or h1.
5. add the red font below under the code.
<b:includable id='post' var='post'><div class='post hentry'><a expr:name='data:post.id'/><b:if cond='data:post.title'><h3 class='post-title entry-title'><b:if cond='data:post.allowComments'><a class='comment-bubble' expr:href='data:post.url + "#comments"' expr:title='"Comments to &quot;" + data:post.title + "&quot;"'><data:post.numComments/></a></b:if>
6. Save your template.
ok, I hope this tutorial useful for your blog, and happy blogging.