In the com.apple.springboard bundle of Touchit I added in this pic as IconBadgeAndCloseBox@2x.png. You can also add it in springboard.app directly if you don't want it tied to the theme.
View attachment 455154
Then I used Badge Customizer to change the position and color a bit.
Okay I'm not sure what I'm doing wrong. I saved this to my camera roll, renamed it and moved it to com.apple.springboard in my theme. When I respring it shows up as square. Any ideas?