add a JavaScript banner Banner

Hello, how can i add a JavaScript banner Banner from amazon ads at the end 
of each page on my blog. 
Here's my blog: https://storezonesnews.blogspot.com/., and a sample of the 
code, it cab be IFrame or JS: 
<iframe 
src="//rcm-na.amazon-adsystem.com/e/cm?o=1&p=9&l=ur1&category=amazonhomepage_2017&f=ifr&linkID=f30be3200ec8d47b530bc804c630ea8e&t=store0276-20&tracking_id=store0276-20" 
width="180" height="150" scrolling="no" border="0" marginwidth="0" 
style="border:none;" frameborder="0"></iframe>


JS Banner code: 

<div class="alignleft">
     <script type="text/javascript">
           amzn_assoc_ad_type = "banner";
    amzn_assoc_marketplace = "amazon";
    amzn_assoc_region = "US";
    amzn_assoc_placement = "assoc_banner_placement_default";
    amzn_assoc_campaigns = "amazonhomepage_2017";
    amzn_assoc_banner_type = "rotating";
    amzn_assoc_p = "9";
    amzn_assoc_width = "180";
    amzn_assoc_height = "150";
    amzn_assoc_tracking_id = "store0276-20";
    amzn_assoc_linkid = "ba19a16b6e7cf8fa59513424a55ceb5d";
     </script>
     <script 
src="//z-na.amazon-adsystem.com/widgets/q?ServiceVersion=20070822&Operation=GetScript&ID=OneJS&WS=1"></script>
    </div>

Thank you!

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