You need something to paint with and paper to paint on.
Now you can paint away.
The picture can be all mixed up.
Or you can paint
what makes you angry.
You can rant or scream when you do that.
Everything inside you that wants to get out
should be put on paper.

Paint until you notice
that your anger is changing.
You can think about what to do with the picture.
You can keep it.
Then you can look at it again later
and feel all the energy and power in the picture.
You can also just throw it away.
Then you'll be rid of the anger.
You can do whatever you like with the picture.