serialize.rs

// get accounts
let accounts_iter = &mut accounts.iter();
let ribbon_account = next_account_info(&accounts_iter)?;
// serialize
let ribbon_data = RibbonAccount { // random struct, idk how I thought of this
  length: 10,
	color: 3
};
ribbon_data.serialize(&mut *ribbon_account.try_borrow_mut_data()?)?;