Look at Preview of this Widget. 

HOW TO INSTALL POP OUT FOLLOW BY EMAIL WIDGET?

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>

INSTALLING WIDGET:-

1. First Add Follow By Email Official Blogger Widget to Your Page Elements Layout.
2. Add the Below Section Of code before closing </head> tag.

   <style type="text/css">
   /*<![CDATA[*/
       .FollowByEmail {background-color: #464646;width: 220px;color: #fff;position: fixed;z-index: 999999;right: 10px;bottom: 0;}
       .followOpened {-webkit-border-radius: 2px 0 0;-moz-border-radius: 2px 0 0;border-radius: 2px 0 0;-webkit-box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);-moz-box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);box-shadow: 0 0 8px rgba(0, 0, 0, 0.5);}
       .w2bfollowButton {background: #464646;color: #CCC;font-size: 13px;line-height: 28px;padding: 0 10px;text-decoration: none;position: absolute;top: -28px;right: 0;display: block;-webkit-box-shadow: 0 -1px 5px rgba(0, 0, 0, 0.2);-moz-box-shadow: 0 -1px 5px rgba(0, 0, 0, 0.2);box-shadow: 0 -1px 5px rgba(0, 0, 0, 0.2);-webkit-border-radius: 2px 2px 0 0;-moz-border-radius: 2px 2px 0 0;border-radius: 2px 2px 0 0;height: 28px;}
       .w2bfollowButton span {background: url("https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglWyjTaUzSbs7kyz7ZC_Cvt-iMf43qBnxOfSYYafQRdFOYubRITxPm79QJ-apVyZI0lcfI9Y81-YqmBw9BPNN__DteEBZ72kDrblDBuAnT2IzW8aimgGlwObVWOzBMXwhUj9NL41vHCfoh/s1600/follow-w2b.png") no-repeat scroll 0 3px transparent;padding-left: 15px;}
       .w2bfollowButton:hover,.followActive {color: #fff !important;}
       .w2bfollowButton:hover span,.followActive span {background-position: 0 -37px !important;}
       .followactive {background-color: #333;}
       .follow-by-email-inner {padding: 15px;}
       .FollowByEmail h2 {padding: 15px 15px 0;font-size: 18px;margin: 0 0 10px;font-weight: normal;}
       .follow-by-email-inner p {margin: 0 0 10px;}
       .follow-by-email-inner .follow-by-email-address {width: 95%;padding: 2px 4px;margin: 0 auto;-webkit-border-radius: 3px;-moz-border-radius: 3px;border-radius: 3px;font-size: 15px;border: 1px solid #444;color: #888;display: block;clear: both;}
       .follow-by-email-inner form {text-align: center;}
       .follow-by-email-inner td{display: inline-block;width:100%;text-align:center;}
       .follow-by-email-inner .follow-by-email-address:focus {color: #000;border-color: #000;}
       .follow-by-email-inner .follow-by-email-submit {cursor: pointer;padding: 2px 20px;background: #333;background: -webkit-linear-gradient(top, #333 0%, #111 100%);background: -moz-linear-gradient(top, #333 0%, #111 100%);background: -o-linear-gradient(top, #333 0%, #111 100%);background: -ms-linear-gradient(top, #333 0%, #111 100%);background: linear-gradient(top, #333 0%, #111 100%);color: #ccc;text-shadow: 0 1px 0 #000;border: 1px solid #282828;-webkit-border-radius: 11px;-moz-border-radius: 11px;border-radius: 11px;-webkit-box-shadow: inset 0 1px 0 #444;-moz-box-shadow: inset 0 1px 0 #444;box-shadow: inset 0 1px 0 #444;text-decoration: none;-webkit-transition: all 0.25s ease-in-out;-moz-transition: all 0.25s ease-in-out;-o-transition: all 0.25s ease-in-out;-ms-transition: all 0.25s ease-in-out;transition: all 0.25s ease-in-out;margin: 1em 0 1em 0;}
       .follow-by-email-submit:hover {background: #222;background: -webkit-linear-gradient(top, #333 0%, #222 100%);background: -moz-linear-gradient(top, #333 0%, #222 100%);background: -o-linear-gradient(top, #333 0%, #222 100%);background: -ms-linear-gradient(top, #333 0%, #222 100%);background: linear-gradient(top, #333 0%, #222 100%);color: #fff;-webkit-box-shadow: inset 0 1px 0 #4f4f4f;-moz-box-shadow: inset 0 1px 0 #4f4f4f;box-shadow: inset 0 1px 0 #4f4f4f;text-decoration: none;}
       .follow-by-email-submit:active {background: #111;background: -webkit-linear-gradient(top, #111 0%, #222 100%);background: -moz-linear-gradient(top, #111 0%, #222 100%);background: -o-linear-gradient(top, #111 0%, #222 100%);background: -ms-linear-gradient(top, #111 0%, #222 100%);background: linear-gradient(top, #111 0%, #222 100%);color: #aaa;-webkit-box-shadow: inset 0 -1px 0 #333;-moz-box-shadow: inset 0 -1px 0 #333;box-shadow: inset 0 -1px 0 #333;text-decoration: none;}
       .w2bFollowFooter {text-align: center;font: normal 11px "Helvetica Neue", sans-serif;padding: 7px 0;margin: 0 0 -15px !important;border-top: 1px solid #3c3c3c;}
       .w2bFollowFooter a {color: #aaa;text-shadow: 0 1px 0 #262626;background: none;text-decoration: none;}
       .w2bFollowFooter a:hover {color: #fff;background: none;}
   /*]]>*/
   </style>
   <script type="text/javascript">
   /*<![CDATA[*/
   ;(function(w2b){w2b(document).ready(function(){w2b.extend(w2b.easing,{easeOutCubic:function(x,t,b,c,d){return c*((t=t/d-1)*t*t+1)+b}});var followBox=w2b(".FollowByEmail");followBox.prepend("<a class=\"w2bfollowButton\" href=\"#\"><span>Follow</span></a>");w2b("<p></p>",{class:"w2bFollowFooter",html:"<a href=\"http://feedburner.google.com\" target=\"_blank\">Delivered by FeedBurner</a>"}).appendTo(followBox.find(".follow-by-email-inner"));followBox.find("td:last").removeAttr("width");var followHeight="-"+followBox.outerHeight()+"px";followBox.hide().css({bottom:"-500px"});setTimeout(function(){followBox.show().animate({bottom:followHeight})},500);w2b(".w2bfollowButton").click(function(e){if(followBox.hasClass("followOpened")){w2b(this).removeClass("followActive");followBox.removeClass("followOpened").animate({bottom:followHeight},{duration:200,easing:"easeOutCubic"})}else{w2b(this).addClass("followActive");followBox.addClass("followOpened").animate({bottom:"0"},{duration:400,easing:"easeOutCubic"})}e.preventDefault()})})})(jQuery);
   /*]]>*/
   </script>

3. Save the Template!