1) Create a new document, then go to channel window 
,
and create a new channel by click on 
(fig1)
Fig 1
2) Make an Oval Selection using the Elliptical Marquee Tool 
, then
fill with white (fig2).
Deselect it
(ctrl+D) and blur it by going to Filter>Blur>Gaussian
Blur......11px (you can try something else) (fig3)
Fig 2
Fig 3
3) Now go up to Filter>Distort>Twirl. I used Angle :
259. (fig4) Your image should be
similiar to fig5 by now 
Fig 4
Fig 5
4) Filter>Pixelate>Color Halftone. I used a Max Radius of
11 but as you experiment with different shapes and sizes you'll want to
also experiment with these settings (fig6). Your image should be similiar to fig7 by now .
Fig
6
Fig 7
5) Now ctrl+click that channel (Alpha 1) to load the selection
(fig8), then go back to layer window
,
create a new layer, pick the color and....fill the selection
(alt+backspace) (fig9)
Fig 8
Fig 9
Thats it 