this is a simple padlock I designed in tinkercad, It's fully functional and only requires a bobby pin and an inkpen spring to work. I've seen a lot of locks on here that require parts not everyone has, this lock was designed to be easy to make with parts you can get at your local convenient store.

I tried drawing some quick instructions on how to place the bobby pin, they're up with the rest of the pics, if you have any problems let me know.