1. The first draw a circle, fill color, and then select the move tool, select the layer, if there is no change control, is in the upper left corner to open the show transform controls, CTRL + R, guides, and to the center of the circle,

2. Then use the rectangle tool to draw a rectangle,

3. Then the CTRL + T to moving to the secondary focus of the center of the rectangle in setting up rotation Angle of 45 degrees Enter


4. Then the CTRL + ALT + SHIFT + T



5. Then select the layer CTRL + J to copy, CTRL + T transform path and then adjust the suitable size SHIFT + ALT, CTRL + E to merge the two circle, and then use the path selection tool click just copy circle, put him to the top and then minus the top, then the merger shape components, gear is ready,



6. In the last two layers merged, tune into your favorite color is ok,