Why do you all worry about how well you can draw! It's not a contest. Just lightly sketch what you see. Don't use a heavy hand and don't use a HB pencil. 2B is sufficient for good results.
You will suprise yourself at how good they come out when drawn lightly and then inverted in Photoshop. You can do the Stars dark as the darker the pencilled star the brighter they will be on the inverted version. Give it a few goes and you will soon see what works and what doesn't. It is fun!
p.s. Me & my boys always leave the seat up!!!! We outnumber the Chicky-Babes in the house