Obfuscation is a lost art. But you, dear hacker, can still learn.
Start by covering your monitor with a sheet of paper. No, seriously, it's a thing.
Next, stare at the blank screen for 10 minutes. The more boring the better.
Then, pretend the blank screen is a canvas. Paint your masterpiece with a Sharpie.
Voilà! You have successfully obscured your view.