<style type='text/css'>
#marqueeposts {width:300px;margin:0;}
.marqueetitle {margin:5px 0 0 0px; background-color:#dcdcdc; padding:0 0 0 0px; text-align:justify;}
.marqueetitle a {color: #5f9ea0; font-weight:bold;font-family:Arial !important;font-size:12px !important;}
.marqueetitle a:hover {color:#FF9933 !important;text-decoration:none !important;}
.marqueetext {margin:2px 0 10px 0; border-bottom:1px solid #2F363E; padding:0px 0 8px 0; font-size:12px; text-align:justify}
.marqueemore a {color: #a52a2a; font-weight:normal !important;font-family:Arial !important;}
.marqueemore a:hover {text-decoration:none !important;}
.marqueedate {color:#008000}
</style>

<script type="text/javascript">
function showrecentposts(json) {
document.write('<marquee id="marqueeposts" direction="up" width="100%" scrollamount="' + postspeed + '" height="' + postheight + 'px" align="top" onMouseOver="stop()" onMouseOut="start()">');
for (var i = 0; i < numposts; i++) {
var entry = json.feed.entry[i];
var posttitle = entry.title.$t;
var posturl;
if (i == json.feed.entry.length) break;
for (var k = 0; k < entry.link.length; k++) {
if (entry.link[k].rel == 'alternate') {
posturl = entry.link[k].href;
break;
}
}
posttitle = posttitle.link(posturl);
var readmorelink = "(Đọc thêm …)";
readmorelink = readmorelink.link(posturl);
var postdate = entry.published.$t;
var cdyear = postdate.substring(0,4);
var cdmonth = postdate.substring(5,7);
var cdday = postdate.substring(8,10);
var monthnames = new Array();
monthnames[1] = "01";
monthnames[2] = "02";
monthnames[3] = "03";
monthnames[4] = "04";
monthnames[5] = "05";
monthnames[6] = "06";
monthnames[7] = "07";
monthnames[8] = "08";
monthnames[9] = "09";
monthnames[10] = "10";
monthnames[11] = "11";
monthnames[12] = "12";
if ("content" in entry) {
var postcontent = entry.content.$t;
} else
if ("summary" in entry) {
var postcontent = entry.summary.$t;
} else var postcontent = "";
var re = /<\S[^>]*>/g;
postcontent = postcontent.replace(re, "");
document.write('<div class="marqueetitle">');
document.write('');
document.write(posttitle);
if (showpostdate == true) {
document.write(' <span class="marqueedate">[' + cdday + '/' + monthnames[parseInt(cdmonth,10)] + '/' + cdyear + ']</span>');
}
document.write('</div><div class="marqueetext">');
if (showpostsummary == true) {
if (postcontent.length < numchars) {
document.write(postcontent);
} else {
postcontent = postcontent.substring(0, numchars);
var quoteEnd = postcontent.lastIndexOf(" ");
postcontent = postcontent.substring(0,quoteEnd);
document.write(postcontent);
document.write(' <span class="marqueemore">... ' + readmorelink + '</span>');
}
}
document.write('</div>');
}
document.write('</marquee>');
}
</script>

<script type="text/javascript">
var numposts = 7; // số bài viết hiển thị
var showpostdate = true; // ngày đăng, đặt false để ẩn đi
var showpostsummary = true; // phần tóm tắt bài viết
var numchars = 100; // số ký tự phần tóm tắt
var postspeed = 2; // tốc độ chạy marquee
var postheight = 250; // chiều cao bài viết
</script>

<script src="http://chipkool.blogspot.com/feeds/posts/default?
orderby=published&alt=json-in-script&callback=showrecentposts">
</script>

<div style="text-align:center;">
<a href="javascript:void(0);"
onclick="getElementById('marqueeposts').direction='down';">
<img src="https://sites.google.com/site/ngonngulaptrinhvn/files/marqueedown.gif"/>
</a>
<a href="javascript:void(0);"
onclick="getElementById('marqueeposts').direction='up';">
<img src="https://sites.google.com/site/ngonngulaptrinhvn/files/marqueeup.gif"/>
</a>
</div>

Chú ý ở dòng #marqueeposts {width:300px;margin:0;}, bạn cần đặt width cho marqueeposts bằng hoặc nhỏ hơn width của sidebar; thay chipkool bằng tên blogspot của bạn.

Nếu bạn muốn hiển thị tiện ích này cho một Nhãn (Label) thì cần thay đoạn code

<script src="http://chipkool.blogspot.com/feeds/posts/default?
orderby=published&alt=json-in-script&callback=showrecentposts">
</script>

thành:

<script src="http://chipkool.blogspot.com/feeds/posts/default/-/Tên nhãn?
orderby=published&alt=json-in-script&callback=showrecentposts">
</script>