First follow the steps from http://www.cutoutandkeep.net/projects/plastic_bottle_flower
Until Step 2.
Then you can start painting. Go from the center then outwards.
After the paint is dry you can Start adding designs.
I finished by adding some simple dots on then other "petals".
One thing i didnt capture in this picture is that i added yellow paint in the center.
Some suggestions are adding a crystal or sparkles.
After i was done painting i glued the flower onto a head band.
And tadda your done and you have a cute hair accessory.