Making up a poem

Q: I have an English project at school in which I need a very specific kind of urdu poem. However, I did not find any suitable urdu poem, so I thought of making up a poem based on a false story, or a real story but with false details, just to achieve the requirements of my assignment. My intention is not to report the story in the poem, but to illustrate the details like setting and characters, genre and the language in it. Is this permissible in Islam, or will this be considered a lie?

Taking a false oath

Q: If I stated a false oath on Quran, for example I say that I swear in the name of Quran that this thing hasn't happened etc. and that because of some complication between husband and wife, to secure their relation is that allowed in Islam? Kindly guide me because I did this to secure a relationship by saying a false oath. Was that wrong or right?