Replace a widget that i created

hi there, a child theme of 2012 (or better, a young frankenstein theme 😉

i learnt how to create my own social widget, the problem is that i wasn’t able to create a real dynamic widget to control in the dashboard, i made a widget that seems permanent on the top of the sidebar.

i just wanted to know how i can replace it wherever i want on the sidebar.
Normally with posts or pages i took the code in the template and place it above or below an element. But with a sidebar is a little different, the elements on the code (feed,recent posts,search etc etc) have not an order (i guess)..

thanks!