Hola I'm taking forever on the drawing I said I was gonna finish but I can show you where I'm at. I also finished another picture I started. I'll show you those too. 

Here's Optimus Prime halfway done:

Pic I'm using as reference-

My attempt to copy it-

Here's other drawings I did off the top of my head:

For the on with color, I did use acrylic paint and colored pencils and a thin sharpie type marker. 

Here's some art that btsforlifeu24 did:

P.S. it's so cute ^_^

But yeah that's it! Hope you enjoyed it!