Custom elytra

Hello im sorry if im in the wrong sub i am new to Reddit. I recently made a custom skin which comes with a custom cape and elytra which shows up in all worlds and servers. The issue is I’m having trouble making the elytra the way I want but I’ve come pretty close it’s just I get frustrated and end up giving up every time and delete it. I came here to see if any of you talented people wanted to give it a shot. I will post images of what I want the elytra to look like. Thank you in advance for any of you who take the time to help me!!!!