I know this is a silly question but, if anyone has seen supernatural, those symbols they used on the show called Devil's traps that if a demon is within its boundaries it will be trapped or contained. Is there anything actually like this in real life, any type of symbols or magical seals, circles, or sigils, that will trap a demon inside of it? Are there any type of magical boundaries whatsoever that can be created that will trap a demonic entity within it? sometimes television uses stuff from actual things, not always but sometimes. Let me know anyone that knows about this.