The pattern is from Lucy over at Attic24.
Actually, it's more of a photo tutorial than a pattern, so if you're still fairly new to crochet you will love it. Lucy takes you through the project step-by-step with loads of photos, so you just can't go wrong. Here's the link so that you can go and take and peek for yourself.
After you've made the flower, you need to paint the back of it with glue to stiffen it.
Which means that it ends up looking pretty revolting from behind - but it will sit beautifully when you hang it!
Mostly I followed the pattern, with a little improvising at the end!
And now (of course) Young Katie would like a flower for her bedroom door.
Look, she's even drawn me a sketch... where on earth would she have got the idea to do that?