lmao my code is a shi*

I don't know what I did but my code became garbage what do I do to fix it :(

https://i.imgur.com/0hA6meo.png

https://i.imgur.com/nKNWbWE.png

I just copied it to a note, and saved it and when what I changed didn't suit me, I pasted it back and it got damaged or put in that format :(, at least it works, but I can't edit it, it's a mess :[