1. Sign into Blogger dashboard
2. Go to Layout » Add a gadget » html/javascript
3. Just copy and paste this code..
<script language="JavaScript">
imgr = new Array();
imgr[0] = "http://i43.tinypic.com/orpg0m.jpg";
imgr[1] = "http://i43.tinypic.com/orpg0m.jpg";
imgr[2] = "http://i43.tinypic.com/orpg0m.jpg";
imgr[3] = "http://i43.tinypic.com/orpg0m.jpg";
imgr[4] = "http://i43.tinypic.com/orpg0m.jpg";
showRandomImg = true;
boxwidth = 298;
cellspacing = 8;
borderColor = "#ffffff";
bgTD = "#000000";
thumbwidth = 40;
thumbheight = 40;
fntsize = 12;
acolor = "#666";
aBold = true;
icon = " ";
text = "comments";
showPostDate = false;
summaryPost = 40;
summaryFontsize = 10;
summaryColor = "#666";
icon2 = " ";
numposts = 5;
home_page = "http://schemar-mag.blogspot.com/";
</script>
<script src="http://myblogtalk.com/bloggertemplates/js/recentposts_thumbnail.js" type="text/javascript"></script>
Explanation:
(Edit the values to fit your blog)
boxwidth - Width of the widgetcellspacing - Space between cells (default one is good)
borderColor - Border color (add the background color of your template to perfectly blend it in the template)
thumbwidth & thumbheight - Width and Height of the thumbnail (default are good)fntsize - Font size of the titleacolor - Color of the titleaBold - you want bold titles? (true or false)
numposts - How many posts you want to show?
home_page : http://schemar-mag.blogspot.com/ (change this to your blog url)
But, it is STRONGLY Recommended to download the script and upload to your own hosting (google for free javascripts hosts) and replace that url with yours.
4. Last but not the least.. Save the Changes.