[Plugin: Latest twitter sidebar widget] How can I change the icon in the Latest Twitter sidebar widg

Hi:

I successfully uploaded the Latest Twitter sidebar widget and it’s displaying on my blog. However, instead of the single “T” Twitter icon that displays, I want to have the icon below displayed in front of each tweet. Can you tell me how or where I go to change the icon? I tried the CSS template in the widget but it didn’t work. Thanks.

https://www.nancypekala.com/wp-content/uploads/2012/05/twitter-bird.png

https://www.ads-software.com/extend/plugins/latest-twitter-sidebar-widget/