1.first create swf file using flash software
2.go to http://sites.google.com/ and login using google account
3.create new site-named as flashswf
4.where attachments click browse-and attach the swf file.
5.now click the attached swf file it will open in the browser -now copy the url then
6.you have to paste the url inside the src=" paste url here"
7.now go to blogger post - edit html - paste the above code
8.view blog your blog will be shown the flash