Creating own brush tool Step 1 Create the new image in photoshop 450х450px. A background white.
Create a new layer. Name it "artbosco".
On a layer "artbosco" allocate a polygon with the tool Polygonal Lasso Tool. Step 2
Apply to a layer "artbosco" Stroke (Edit> Stroke) with parameters as in a picture.
Step 3 On a layer "artbosco" allocate a polygon with the help of the tool Elliptical Marquee Tool.
Apply for allocation Define Brush Preset (Edit> Define Brush Preset).
Keep a brush under a name «Art Brush». Step 4 Allocate a layer "artbosco" (Ctrl+A) also remove the allocated area. Remove allocation.
Take the tool Brush Tool. Choose from the list of brushes a brush «Art Brush».
Click "Toggle the Brushes Palette".
In section Dual Brush establish parameter Spacing on 10 %. Step 5 Do short lines by a brush. Depending on a direction various effects turn out.