Keep on getting very many errors for the script and don't know how to fix them

 do (MFRC522 _=::/(.init))();

That looks like that got badly mangled in transmission. I can't even guess what was intended.

once done MFRC522 _=::(.halt)();

Or that.

Can you please go back and edit your post to put the code in code tags and add at least some of the error messages?