Mailchimp Archive Code

Site URL: https://stradegy0.squarespace.com

site: https://stradegy0.squarespace.com
pw: stradegy

Disclaimer: I know next to absolute nothing about coding. A team I'm working with wants to add an archive of their newsletters to their homepage. This is the code that Mailchimp offers up: 

<style type="text/css">
<!--
.display_archive {font-family: arial,verdana; font-size: 12px;}
.campaign {line-height: 125%; margin: 5px;}
//-->
</style>
<script language="javascript" src="//stradegy.us20.list-manage.com/generate-js/?u=3e33660085a44f8d3ee5cdd16&fid=15068&show=10" type="text/javascript"></script>

If you enter that into a code block absolutely nothing happens. What am I doing wrong? Does it need to be in in some kind of <div> ? Thank you so much in advance for your help!

I added it into a code block on square space and had selected JavaScript as the language. 

17 hours ago, HelenT said:

I added it into a code block on square space and had selected JavaScript as the language. 

Try adding it to Page Header or Code Injection > Footer