Here's how Cartoon Network and Adult Swim both signed off and on during CN's "Noods" era (2008-10). I like how Cartoon Network was fully aware of Adult Swim's existence (unlike nowadays), as the "Noods" (the namesake of the era) painted a "Parental Advisory: Mature Content" icon right before Adult Swim came on, and they also painted over Adult Swim's logo when Cartoon Network came back on. Enjoy!