I ate a banana.
I drank water.
I had eaten a banana before I drank water.

Good！

I played video games.
I writed homework.
I had writed homework before I played video games.

Past tense form of the word ‘write’ is ‘wrote’.
Past participle form of ‘write’ is ‘written’.
Please review the past tense and past participle of irregular verbs.

And we always say that we write our homework.
You should make it clear that whose homework it is.

I played video games.
I wrote my homework.
I had written my homework before I played video games.