I am sorry, maybe I am not being clear about my question...Facebook has plugin code and I know how to get the code: after typing in my blog info, it gives me the following:
I don't know what to do about #1 below. Where am I supposed to place the code#1? I tried to copy and paste the code 2 to the Text Wiget, but it does not work. It does not show any button.
1.
Include the JavaScript SDK on your page once, ideally right after the opening <body> tag.
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
2.
Place the code for your plugin wherever you want the plugin to appear on your page.
<div class="fb-like" data-href="http://athomeusa.wordpress.com" data-send="false" data-width="450" data-show-faces="false"></div>