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Para colocar no blog... Entre em "Layout" - "Adicionar um Gadget" - "HTML/JavaScript" e cole o seguinte código
<style>
#flotante1 {
position:fixed;
top:100px;
right:-250px;
float:right;
width:288px;
display:block;
padding:0;
z-index:1002;
-moz-transition: all 1s;
-webkit-transition: all 1s;
-o-transition: all 1s;
}
#flotante2 {
position:fixed;
top:240px;
right:-250px;
float:right;
width:288px;
display:block;
padding:0;
z-index:1003;
border-radius:10px;
-moz-transition: all 1s;
-webkit-transition: all 1s;
-o-transition: all 1s;
}
#flotante3 {
position:fixed;
top:380px;
right:-250px;
float:right;
width:288px;
display:block;
padding:0;
z-index:1004;
border-radius:10px;
-moz-transition: all 1s;
-webkit-transition: all 1s;
-o-transition: all 1s;
}
#flotante1:hover, #flotante2:hover, #flotante3:hover {
right:0px;
-moz-transition: all 1s;
-webkit-transition: all 1s;
-o-transition: all 1s;
}
div.likeboxwrap {
margin-top:-5px;
margin-left:-45px;
width:238px;
height:325px;
background-color:#fff;
overflow:hidden;
border-radius:10px;
}
</style>
<!-- Primera pestaña -->
<div id='flotante1'>
<img src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglGkM70fBkRMBk7I_LG6zPhrmwxyY4MT_8JZNwQWRYT7P80tk5lpQc3jV92-MRXmQODzyF65lcnNq7YII4CLLc2Ct-PyypmN7yfR9kpdF0AiO2Bmo3XoKvvdGe5PF1-6gD0bvvAEZaTsM/' style='float:left;'/>
<div style='background: #3c5a98; height:325px; margin-left:38px;padding: 8px 5px 0pt 50px;border-radius: 0px 0px 0px 10px;'><span><div class='likeboxwrap'><iframe allowtransparency='true' frameborder='0' scrolling='no' src='http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2FNome da sua página do facebook&width=240&colorscheme=light&connections=15&stream=false&header=false&height=350' style='border:none; overflow:hidden; width:240px; height:325px;'/></iframe>
</div></span></div></div>
<!-- Segunda pestaña -->
<div id='flotante2'>
<img src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgl16otQBMzdhO0dpa1bjFxrhsKBz_WS_Pm15o-qNmLYRkNTx0fntVJ7Zgp35VVtrBy1JzP7nRpMKZ96ZYqliFdSOc4oqaJzbXpD7kPxYgK60nZZR9tqd2TCMicEPGIqq4AIo_TmO4zr_A/s159/goo_tab.png' style='float:left;'/>
<div style='background: #9A9FA8; height:325px; margin-left:38px;padding: 8px 5px 0pt 50px;border-radius: 0px 0px 0px 10px;'><span><div class='likeboxwrap' style="padding-left:20px; padding-top:15px; height:310px !important;">
<div class="g-plus" data-action="followers" data-height="300" data-href="https://plus.google.com/XXXXXXXXXXXXXX" data-source="blogger:blog:followers" data-width="240">
</div>
<script type="text/javascript">
(function() {
window.___gcfg = {'lang': 'es'};
var po = document.createElement('script');
po.type = 'text/javascript';
po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(po, s);
})();
</script>
</div></span></div></div>
<!-- Tercera pestaña -->
<div id='flotante3'>
<img src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBP4LvIfUBQrak6Km2qegPIxotCnU40G3kiYLTg95JWRl3wP5nA3Qfpdo_9qZ3moTUiOM7hqOmXUIeNWxfZ3Yes41smjnwYhZ-aSOZ-2qJ94RocwU-VAQv8glFSQc2RDli9uiqwMVxabw/' style='float:left;'/>
<div style='background: #00a0e8; height:325px; margin-left:38px;padding: 8px 5px 0pt 50px;border-radius: 0px 0px 0px 10px;'><span><div class='likeboxwrap'>
<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js' type='text/javascript'></script>
<style>
.follow_box_widget{overflow: hidden; padding-left: 5px; padding-right: 5px; padding-top: 5px; background-color: #fff transparent; position: relative; margin: auto;}
.follow_box{font-size: 11px; font-family: "lucida grande",tahoma,verdana,arial,sans-serif; color: #333; line-height: 1.28; text-align: left; direction: ltr;}
.follow_box .follow_top{padding: 5px 10px 0px 5px; margin-bottom: 8px; min-width: 230px; overflow: hidden;}
.follow_box .profileimage{float: left; width: 40px; height: 40px; padding: 0px; margin: 0 10px 4px 0;}
.follow_box img{border: 0;}
.follow_box a{cursor: pointer; color: #3B5998; text-decoration: none;}
.follow_box a:hover{text-decoration: underline;}
.follow_action{padding: 0 0 0 8px;}
.follow_box .follow_action .name{line-height: 15px; font-size: 14px; font-weight: bold;}
.follow_box .follow_button{margin: 5px 0 0;}
.follow_box .total{min-width: 230px; overflow: hidden; display: block;}
.follow_box .connections{padding: 5px 0 4px 0px; border-top: solid 1px #D8DFEA; border-bottom: 1px solid #CCC; min-height: 150px;}
.follow_box .connections .connections_grid{padding-top: 5px; overflow: hidden;}
.follow_box .clearfix{zoom: 1;}
.follow_box .connections .connections_grid .grid_item{float: left; margin:0px; margin-right: 5px; margin-bottom: 8px; overflow: hidden; width: 50px;}
.follow_box .connections .connections_grid .grid_item .name{font-size: 9px; color: gray; overflow: hidden; padding-top: 2px; text-align: center; white-space: nowrap;}
.follow_box .connections .connections_grid .grid_item img{width: 48px; height: 48px;}
.follow_box .follow_widget_footer{ cursor: default; width: 100%; min-width: 230px; overflow: hidden;}
.follow_box .footer_border{ margin-top: 5px;}
.follow_box .uiImageBlock{line-height: 14px;}
.follow_box .follow_widget_footer .footer_logo{float: left; margin-right: 5px;}
.follow_box .follow_widget_footer .footer_text{cursor: default; color: #808080; font-size: 9px; float: left;}
.follow_box .follow_widget_footer .footer_text a.footer_text_link{color: #808080;}
.follow_box .titlecase{text-transform:capitalize;}
</style>
<script>
/*
* Twitter Follow Box jQuery Plugin
* http://jobyj.in/twitter-follow-box-widget/
* Copyright 2012, Joby Joseph
* Free to use under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
*/
(function(a){a.fn.followbox=function(b){function f(a,b){if(a>100)a=100;var c=new Array;for(var d=0;d<a;d++){c.push(b[d])}var e=c.join();return e}var c=a(this);var d="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjCS5zezLvt-CG7y673f-Fkfy6NVuACIif3CdX1tItmhIkfy-uGsHGc-uYFdwB2Ac8CvPM8RxX2Aw7IquRaCskUU9UAmuuBSRrcGXkYfjjdRXtw9WlOVF4Ny3pAzwzKRyYiUazi-wrCn7M/";var e=a.extend({user:"jobysblog",width:292,height:252,theme:"light",border_color:"#AAA",bg_color:"#fff",bg_image:"",title_color:"#3B5998",total_count_color:"#333",follower_name_color:"#BBB"},b);a.ajax({url:"http://api.twitter.com/1/users/lookup.json?screen_name="+e.user+"&include_entities=true",dataType:"jsonp",success:function(b){var g=e.width-2;var h=e.height-2;var i=e.height-115;var j=parseInt(e.width/55);var k=parseInt(i/69)+1;var l=j*k;c.html('<div class="follow_box_main" style="border: 1px solid #bbb; width: '+g+"px; height: "+h+'px;"><div class="follow_box_widget"><div class="follow_box"><div><div class="follow_top clearfix"><a href="http://www.twitter.com/'+e.user+'" target="_blank"><img class="profileimage img" src="'+b[0].profile_image_url_https+'" alt="'+b[0].name+'"></a><div class="follow_action"><div class="name_block"><a href="http://www.twitter.com/'+e.user+'" target="_blank"><span class="name titlecase">'+b[0].name.toLowerCase()+"</span> @"+b[0].screen_name+'</a></div><div class="follow_button"><iframe allowtransparency="true" frameborder="0" scrolling="no" src="//platform.twitter.com/widgets/follow_button.html?screen_name='+e.user+'&show_count=false&show_screen_name=false&lang=es" style="width:100px; height:20px;"></iframe></div></div></div><div class="connections"><span class="total"><span class="follow_box_follower_count">'+b[0].followers_count+'</span> personas siguen a <b class="titlecase">'+b[0].name.toLowerCase()+'</b></span><div class="connections_grid clearfix" style="height:'+i+'px;"></div></div></div><div style="height: 23px"><div class="follow_widget_footer"><div class="footer_border"><div class="clearfix uiImageBlock"><a class="footer_logo" target="_blank" href="http://jobyj.in/twitter-follow-box-widget"><img src="'+d+'"/></a><div class="footer_text"><a class="footer_text_link" target="_blank" href="http://jobyj.in/twitter-follow-box-widget">Twitter Social Plugin</a></div></div></div></div></div></div></div></div>');if(e.theme=="dark"){c.find(".follow_box_main").addClass("dark")}c.find(".follow_box_follower_count").text(c.find(".follow_box_follower_count").text().replace(/(\d)(?=(\d\d\d)+(?!\d))/g,"$1,"));if(a.browser.msie&&!a.support.boxModel)a(".follow_box .connections").css("padding-bottom","14px");if(e.theme=="custom"){c.find(".follow_box_main").css({"border-color":e.border_color,"background-color":e.bg_color,"background-image":'url("'+e.bg_image+'")'});c.find(".follow_box a").css({color:e.title_color});c.find(".follow_box .total").css({color:e.total_count_color})}a.ajax({url:"https://api.twitter.com/1/followers/ids.json?cursor=-1&screen_name="+e.user,dataType:"jsonp",success:function(b){var d=f(l,b.ids);a.ajax({url:"https://api.twitter.com/1/users/lookup.json?user_id="+d+"&include_entities=true",dataType:"jsonp",success:function(b){for(var d=0;d<b.length;d++){var f=a.trim(b[d].name);var g=f.split(" ");var h='<div class="grid_item"><a href="http://twitter.com/'+b[d].screen_name+'" target="_blank"><img class="img" src="'+b[d].profile_image_url+'" alt=""><div class="name titlecase">'+g[0].toLowerCase()+"</div></a></div>";c.find(".connections_grid").append(h)}if(e.theme=="custom"){c.find(".connections .connections_grid .grid_item .name").css({color:e.follower_name_color})}}})}})}})}})(jQuery)
</script>
<script>
$(document).ready(function(){
$('#twitterfollowbox').followbox({
'user':'Nome de usuário no twitter',
'height':'300',
'width':'260',
'theme':'custom',
'border_color':'#ffffff',
'bg_color':'#ffffff',
'bg_image':'',
'title_color':'#3B5998',
'total_count_color':'#333333',
'follower_name_color':'#BDBDBB'
});
});
</script>
<div id="twitterfollowbox" class="follow-box-container"> </div>
</div></span></div></div>
Tendo colado o código, faça as modificações nas partes destacadas de AZUL no código. Tendo feito isto, está pronto!!!
Qualquer dúvida, não deixe de perguntar. 
