The way to implement it is also quite easy, you just need to add the code that I will share this into a new widget.
1. Login to Blogger> Layout> Click Add Gadget> Then copy all the code below into the new widget.
<style scoped='' type='text/css'>
/* Recent Post Navigasi */
#recentpostnav{border:1px solid #585858;width:100%;margin:0 auto}
#recentpostsae{margin:0}
.recentpostel{background:#fff;display:block;border:1px solid #ddd;margin:5px 0;padding:10px;height:79px}
.recentpostel img{background:#fff;padding:4px;float:left;height:70px;margin-right:8px;width:70px;border:1px solid #ddd}
.recentpostel h6,.recentpostel h6 a{text-decoration:none;font-size:13px!important;font-weight:700!important;margin:0;color:#111}
.recentpostel:hover{background-color:#fefefe}
.recentpostel p{font-size:12px;text-align:left;color:#555;line-height:normal;margin:5px 0}
#recentpostload{color:#888;font-family:Tahoma;font-size:100px;letter-spacing:-10px;text-align:center;text-shadow:-5px 0 1px #444;background:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCiezHB1SIj1Ffmkv6klxjbkBzxUynPCsBWOhgw26PK1A-UaMTyKGd_09iRwf5lvjAYnH5woSp8h3zdDEQmj-LczjY1f6p8QzQV-bZV9ep5aNRtHwaWJQ6e2reA5-0P0zwAuwerexsmI2t/s1600/loader.gif) 50% 50% no-repeat #fff;height:470px;border:1px solid #ddd}
#recentpostnavfeed{border:1px solid #ddd;color:#bbb;font-family:Verdana;font-size:12px;text-align:center;margin:0}
#recentpostnavfeed:hover{background-color:#fefefe}
#recentpostnavfeed a{color:#141414!important;font-family:Tahoma!important;font-size:12px!important;font-weight:400!important;display:block;padding:5px 10px}
#recentpostnavfeed span{padding:5px 10px}
#recentpostnavfeed .next{float:right}
#recentpostnavfeed .previous{float:left}
#recentpostnavfeed .home{text-align:center}
#recentpostnavfeed a:hover,#recentpostnavfeed span.noactived{color:transparant!important}
</style>
<script type='text/javascript'>
//<![CDATA[
var numfeed = 5;
var startfeed = 0;
var urlblog = "http://viennatheme.blogspot.com";
var charac = 40;
var urlprevious, urlnext;
function arlinafeed(e,t){for(var n=e.split("<"),r=0;r<n.length;r++)-1!=n[r].indexOf(">")&&(n[r]=n[r].substring(n[r].indexOf(">")+1,n[r].length));return n=n.join(""),n=n.substring(0,t-1)}function showrecentpostsae(e){var t,n,r,a,i,s="";urlprevious="",urlnext="";for(var l=0;l<e.feed.link.length;l++)"previous"==e.feed.link[l].rel&&(urlprevious=e.feed.link[l].href),"next"==e.feed.link[l].rel&&(urlnext=e.feed.link[l].href);for(var d=0;d<numfeed&&d!=e.feed.entry.length;d++){t=e.feed.entry[d],n=t.title.$t;for(var l=0;l<t.link.length;l++)if("alternate"==t.link[l].rel){r=t.link[l].href;break}i="content"in t?t.content.$t:"summary"in t?t.summary.$t:"",a="media$thumbnail"in t?t.media$thumbnail.url:"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz1LJ8S7MADDROD_MM-GJpBWN7Sb_cd6TpKln-A93F8A-pqtIVGPglMLj96IAIHIgh_Dr7FYFM8xzwH1ig2vyqzixT3BA4tqxj2MViN6VbCPdBROF-7P321hYgDRfhab0vnFJSkkvPbuui/s1600/no-image.png",s+="<div class='recentpostel'>",s+="<a href='"+r+"' target='_blank'><img src='"+a+"' /></a>",s+="<h6><a href='"+r+"'>"+n+"</a></h6>",s+="<p>"+arlinafeed(i,charac)+"...</p>",s+="</div>"}document.getElementById("recentpostsae").innerHTML=s,s="",s+=urlprevious?"<a href='javascript:navigasifeed(-1);' class='previous'>Previous</a>":"<span class='noactived previous'>Previous</span>",s+=urlnext?"<a href='javascript:navigasifeed(1);' class='next'>Next</a>":"<span class='noactived next'>Next</span>",s+="<a href='javascript:navigasifeed(0);' class='home'>Home</a>",document.getElementById("recentpostnavfeed").innerHTML=s}function navigasifeed(e){var t,n;-1==e?(t=urlprevious.indexOf("?"),n=urlprevious.substring(t)):1==e?(t=urlnext.indexOf("?"),n=urlnext.substring(t)):n="?start-index=1&max-results="+numfeed+"&orderby=published&alt=json-in-script",n+="&callback=showrecentpostsae",incluirscript(n)}function incluirscript(e){1==startfeed&&removerscript(),document.getElementById("recentpostsae").innerHTML="<div id='recentpostload'></div>",document.getElementById("recentpostnavfeed").innerHTML="";var t=urlblog+"/feeds/posts/default"+e,n=document.createElement("script");n.setAttribute("type","text/javascript"),n.setAttribute("src",t),n.setAttribute("id","arlinalabel"),document.getElementsByTagName("head")[0].appendChild(n),startfeed=1}function removerscript(){var e=document.getElementById("arlinalabel"),t=e.parentNode;t.removeChild(e)}onload=function(){navigasifeed(0)};
//]]>
</script>
<div id="recentpostsae"></div>
<div id="recentpostnavfeed"></div>2. Change the code marked, click Save.
Information :
- var numfeed: Number of posts displayed.
- urlblog var: Fill in your blog address.
- charar var: the maximum number of summary posts displayed.