User talk:209.159.247.206

September 2023
Hello, I'm Joyous!. An edit that you recently made to Physical system seemed to be a test and has been reverted. If you want to practice editing, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page. Thanks! Joyous! Noise! 01:43, 27 September 2023 (UTC)