cara membuat slide post populer

1. Login ke blogger
2. Pilih Rancangan kemudian Tambah Gadget
3. Pilih HTML/JavaScript
4. Masukan kode HTML berikut ini:

<style type="text/css" media="screen">

#PopularPosts1 {
overflow:hidden;
margin-top:5px;
width:100%;
padding:0px 0px;
height:310px;


}

#PopularPosts1 ul {
width:310px;
overflow:hidden;
list-style-type: none;
padding: 0px 0px;
margin:10px 0px 0px 10px;
}

#PopularPosts1 li {
 width:290px;
padding: 5px 5px;
margin:0px 0px 5px 0px;
list-style-type:none;
float:none;
height:80px;
overflow: hidden;
background:#fff url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh056QOLQtZFFo-JtuMqUEJfgtGvNnrr97FnaatsiYN3JZ6mvWemAU7Pj_Ky2cQ6DsuyhOPNjxJ4n4XMNsM0hOZLQylCFA8-MF4pUFUgd-DKfIlnrEcG3tHQZkObIvNihIdk4hbiBjgmY8/s400/popular+posts.jpg) repeat-x;
border:1px solid #ddd;
}

#PopularPosts1 li .item-title {
 
    font-size:1em;
    margin-bottom:0.5em;
}

#PopularPosts1 li .item-title a {
text-decoration:none;
color:#7CA2C4;
font:bold 12px verdana;
height:18px;
overflow:hidden;
margin:0px 0px;
padding:0px 0px 2px 0px;
}

#PopularPosts1 li img {
float:left;
margin-right:5px;
background:#EFEFEF;
border:2px solid #7CA2C4;
}

#PopularPosts1 li .item-snippet {
  overflow:hidden;
font-family:Tahoma,Arial,verdana, sans-serif;
font-size:10px;
color:#289728;
padding:0px 0px;
margin:0px 0px;
}

#PopularPosts1 .item-snippet a,
#PopularPosts1 .item-snippet a:visited {
    color:#3E4548;
    text-decoration: none;
}

#PopularPosts1 .spyWrapper {
    height: 100%;
    overflow: hidden;
    position: relative;
}

#PopularPosts1 {
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
}

.tags span,
.tags a {
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
}

a img {
    border: 0;
}

-->
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript" charset="utf-8">
$(function () {
    $('.popular-posts ul').simpleSpy();
});
</script>
<script src="http://accordion-for-blogger.googlecode.com/svn/trunk/simplespy.js" type="text/javascript"></script>

Lalu simpan dan taruh di bawah populer.
Demikianlah info yang dapat saya  berikan untuk sobat sekalian moga bermanfaat 
Selamat mencoba dan berkreasi............salam blogger.............^_^
 
Keterangan :
pada  kode width:100%; merupakan ukuran lebar
pada kede height:310px  merupakan ukuran tinggi