Jackson Pollock used a dripping paint technique, for that you just need a floor and an old sheet, or paper,
some paint, and alcohol, bunch of alcohol.
If you have an old t-shirt colour dark blue, you can experiment with the same technique using household cleaning products instead of paint.
Never mix Ammonia and Chlorine based cleaning products!
You might just end up with a cool Pollock style t-shirt.
Nevertheless, I did enjoy the little xmass accent.
The hardest part about doing anything new is to actually go out and start doing it.
You, my friend, made a first step.

Also consider using [CO], [CR], and [CU] tags in your entries titles. [CO] stands for Contest, [CR] stands for Creation, and [CU] stands for Curation.