Scratch

http://scratch.mit.edu/projects/nXIII/948434

(Download)
At first I thought it was simply a sprite following your mouse, nothing more.
Then I relised, if you double clicked it it acted like a real variable, In the variable's tab I showed the variable, and the "Sprite" variable and the "Real" one seemed to be linked, all of this was without scripts doing so.
I noticed when you set it too slider the V in variable started glitching.
The "Sprite" named variable  had an invisible costume, which is impossible to do.

I have made another project which when downloaded you can see the glitches allot clearer. I am uploading it now.