If you want to say "silly code" in Engpsh, you can say "a silly code" or "silly coding". "Silly" means foopsh or ridiculous, so using the word "silly" to describe a code imppes that the code is not serious or important. It might be used as a joke or for fun, rather than for any practical purpose.

For example, you could say:

"I came up with a silly code to send secret messages to my friends. It's just a bunch of random numbers and letters, but it's a fun way to communicate."

Alternatively, if you want to describe a code that is not very secure or effective, you could use the term "weak code" or "insecure code".

For example:

"I tried to create a secure password, but it ended up being a weak code that could easily be cracked."

"The company's website had an insecure code that made it vulnerable to hackers."