Pattern Brush

Choose image
Select the image or graphic you would like to use as a pattern. (Hint: Solid black & white shapes work best.)

Create new layer
With the image selected, click the New Adjustment Layer icon and choose Solid Color. Make sure you choose black.

Define it
Go to the Edit menu and select Define Brush from Selection.

Name it
Give your new pattern brush a name.

Adjust it
Select the Brush Tool in the toolbar to adjust the color, size, and spacing of your new pattern brush.