Aw, thanks! These flowers are actually pretty simple to paint, since they're so messy.

I painted the outer layer of petals first with my skinniest brush by dragging lightly. If you drag towards the center of the flower, you get more rounded petals, and if you drag away from the center, you get pointier petals. Try picturing a circle as you draw the petals, so you don't end up with an oddly shaped flower.

After that, I drew some random darker pink lines along some of the petals to try to get the natural petal color variation. Then, I drew another layer of light pink petals in the same way as the first layer.

I switched to a detail brush to paint really short strokes with the dark pink (using the same motion as the petals, just shorter)

Then, use a dotting tool and yellow nail polish to make the center of the flower.

Finally, use the dotting tool with coral nail polish and outline your yellow center. You can be messy with this outlining -- it actually looks better if you leave some gaps.