Slide profissional aplicado facilmente em HTML/Javascript

Slide ao passar mouse por cima do título 
(aparece a data e o nome do autor)

Slide normal

Bom este slide aplicava-se em 2 processos, no caso em HTML e CSS (separados) então eu juntei os 2 códigos e agora ele pode ser instalado somente em HTML/Javascript veja o como:

Caso você não saiba como adicionar um gadget/widget no blogger click aqui

<style type="text/css"> ul.featured-widget-list,ul.featured-widget-list li{ margin:0; padding:0; list-style:none; position:relative } ul.featured-widget-list li{display:none} ul.featured-widget-list li:nth-child(1){ display:block; line-height:0} ul.featured-widget-list img{ border:0; width:100%; height:auto} ul.featured-widget-list .featuredbg{ width:100%;  height:100%; position:absolute; z-index:2; left:0; top:0; opacity:.6; background-image:url(https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitzy109v1uOz3S_W8mhJLUgJrVs_WPGgL3B9Zps7_1EtlY_NjtlK5xXmLtwJpU7uUtrhX8uTV7B51heXDEQ93DhwGNNFTwFl9z35xL5O1TNg76IkqjshIqkRh-cCXjD6k-0KG0Ivps4jw/s400/overlay-bg.png); background-position:0% 100%; background-repeat:repeat-x}
ul.featured-widget-list .featuredbg:hover{opacity:.1} ul.featured-widget-list h5{ position:absolute; left:0;right:0; text-align:center; bottom:10px; z-index:2; color:#fff; /* COR DA FONTE */
margin:0; text-transform: none; padding:10px 20px;
line-height:1.9em;
letter-spacing:0.3px;
font: 16px 'Roboto', sans-serif; /* TIPO E TAMANHO DA FONTE DO TÍTULO */
overflow:hidden}
ul.featured-widget-list li:hover h5{bottom:30px}
ul.featured-widget-list .featured-meta{
font: 13px 'Roboto', sans-serif; /* TIPO E TAMANHO DA FONTE DA DATA E AUTOR */
letter-spacing:0.3px;
position:absolute;
bottom:0;left:0;
right:0;
text-align:center;
z-index:2;
color:#fff; /* COR DO TEXTO */
opacity:0}
ul.featured-widget-list h5, ul.featured-widget-list .featured-meta { -webkit-transition: all 0.3s;
-moz-transition: all 0.3s;
-o-transition: all 0.3s;transition: all 0.3s;}
ul.featured-widget-list li:hover .featured-meta{bottom:20px;opacity:1} .feat-buttons{position:absolute;top:50%;z-index:5;width:100%} .feat-buttons a{ text-indent:-9999px; margin:0 7px; margin-right: 30px; width:15px; height:15px; padding:5px; background:#transparent; /* COR DE FUNDO DOS BOTÕES */ -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=60)";filter: alpha(opacity=60); -moz-opacity:0.6; -khtml-opacity:0.6; opacity:0.6; position:relative; -webkit-border-radius: 50%; -moz-border-radius: 50%; border-radius: 50%;} .feat-prev{float:left;} .feat-next{float:right;} .feat-buttons a.feat-prev::before, .feat-buttons a.feat-next::before{content:""; width:0; height:0; border-width:6px 7px; border-style:solid; border-color:transparent transparent transparent transparent; position:absolute; top:50%; margin-top:-6px; margin-left:-11px; left:50%} .feat-buttons a.feat-next::before{ border-color:transparent transparent transparent transparent; /* COR DA FONTE DOS BOTÕES */ margin-left:-3px} </style> <div id="featuredbwidget"></div> <link href='https://fonts.googleapis.com/css?family=Roboto' rel='stylesheet' type='text/css'/> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js" type="text/javascript"></script> <script type='text/javascript'> //<![CDATA[ featuredbwidget({
listURL:"URL DO BLOG/SITE",
featuredNum:20,
listbyLabel:false,
feathumbSize:350,
interval:3000,
autoplay:true,
featuredID:"#featuredbwidget"
});
function featuredbwidget(a){(function(e){var h={listURL:"",featuredNum:3,featuredID:"",feathumbSize:300,interval:5000,autoplay:false,loadingFeatured:"nextfeatured",pBlank:"https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixsl3w06j4odsC2Ck4702kvJKGP941le-RIZmVJ3V8SykN60ugQEKHLHzXhAvxytzDaAEdId2iTM7V-cMv1qsVERWkn1FNB1q2PWxSlapoPjEgbBWeEIyNi3sIip3QazOJ-aU9d5xEm0o/s500/no-image.png",byMonth:["Janeiro","Fevereiro","Março","Abril","Maio","Junho","Julho","Agosto","Setembro","Outubro","Novembro","Dezembro"],listbyLabel:false};h=e.extend({},h,a);var g=e(h.featuredID);var d=h.featuredNum*200;g.html('<div class="featslider"><ul class="featured-widget-list"></ul><div class="feat-buttons"><a href="#" class="feat-prev">Prev</a><a href="#" class="feat-next">Next</a></div></div>');var f=function(w){var q,k,m,u,x,p,t,v,r,l="",s=w.feed.entry;for(var o=0;o<s.length;o++){for(var n=0;n<s[o].link.length;n++){if(s[o].link[n].rel=="alternate"){q=s[o].link[n].href;break}}if("media$thumbnail" in s[o]){u=s[o].media$thumbnail.url.replace(/\/s[0-9]+\-c/g,"/s"+h.feathumbSize+"-c")}else{u=h.pBlank.replace(/\/s[0-9]+(\-c|\/)/,"/s"+h.feathumbSize+"$1")}k=s[o].title.$t;r=s[o].published.$t.substring(0,10);m=s[o].author[0].name.$t;x=r.substring(0,4);p=r.substring(5,7);t=r.substring(8,10);v=h.byMonth[parseInt(p,10)-1];l+='<li><a href="'+q+'"><div class="featuredbg"></div><img class="featuredthumb" src="'+u+'"/><h5>'+k+'</h5></a><div class="featured-meta"><span class="fdate"><span class="fday">'+t+'</span> <span class="fmonth">'+v+'</span> <span class="fyear">'+x+'</span></span> - <span class="fauthor">'+m+"</span></div></li>"}e("ul",g).append(l).addClass(h.loadingFeatured)};var c=function(){e(h.featuredID+" .feat-next").click()};var b=function(){e.get((h.listURL===""?window.location.protocol+"//"+window.location.host:h.listURL)+"/feeds/posts/summary"+(h.listbyLabel===false?"":"/-/"+h.listbyLabel)+"?max-results="+h.featuredNum+"&orderby=published&alt=json-in-script",f,"jsonp");setTimeout(function(){e(h.featuredID+" .feat-prev").click(function(){e(h.featuredID+" .featslider li:first").before(e(h.featuredID+" .featslider li:last"));return false});e(h.featuredID+" .feat-next").click(function(){e(h.featuredID+" .featslider li:last").after(e(h.featuredID+" .featslider li:first"));return false});if(h.autoplay){var i=h.interval;var j=setInterval(c,i);e(h.featuredID+" .featslider li:first").before(e(h.featuredID+" .featslider li:last"));e(h.featuredID+" .featslider").hover(function(){clearInterval(j)},function(){j=setInterval(c,i)})}e("ul",g).removeClass(h.loadingFeatured)},d)};e(document).ready(b)})(jQuery)}; //]]> </script> O próximo passo é colocar a url do blog no espaço (URL DO BLOG/SITE)
Salve, visualize e veja se deu tudo certo.

Boa sorte e espero que funcione. Até a próxima se Deus permitir.