1. Open a photo to work with
2. Leave the photo layer locked and set as the background. Also make sure
your photo is in RGB color mode. To check this, go to the 'Image' menu, then
select 'Mode' and ensure 'RGB' is selected.
3. Create a new layer above the background layer called 'brush'
4. With the 'brush' layer selected. Use a hard brush and you can
use any color.
5. Go into the action's panel.
6. Now hit the play button found at the bottom of the action panel!