Elytra recipe

Lyrics of my song "Crafting an elytra": I believe I can fly! Besauce I can craft an elytra! Elytras are so awesome! But I need some fireworks! How to get them, how to get them? Oh! You need to craft them. Just some paper and gunpowder! And that's easy and usefull for me! Elyyyyyyyyyyytra!!!