Hi Benjamin,
Try this :
Turn Front page edit on.
Go to add block and add a new HTML block.Choose "Configure HTML block" from the newly added block.
In the content area toggle to HTML source view (button with <> signs on );
Get your code from Feedjit for INSTALLING IN ANY BLOG OR WEBSITE;
Something like this :
<script type="text/javascript" src="http://feedjit.com/serve/?vv=1515&tft=3&dd=0&wid=8ee86cce8850d3616ecb117629b45850&pid=0&proid=0&bc=FFFFFF&tc=000000&brd1=012B6B&lnk=135D9E&hc=FFFFFF&hfc=2853A8&btn=C99700&ww=200&went=10"></script><noscript><a href="http://feedjit.com/">Live Traffic Stats</a></noscript>
then paste it to the HTML content area;
Click update;
Chose your options as for Where this block appears;
Save changes;
Done.
I hope this helps.