Peter Rader :
mle :
Upvote for the cutest question ever.
Regarding the colors: Reminds me of visualization of test coverage with EclEmma, which shows its results with coloured markers for fully (green), partly (yellow) or not (red) covered source code.
You can get rid of the coloured markers by deleting the coverage results by clicking the single or double grey "x" in the coverage view like shown at the bottom of the following screenshot.