The layer’s parameters: Fill 0%
Blending Options>Stroke

 

 

Combine in a group all the layers, composing the second made star (press Ctrl button as usually for marking out the appropriate layers and hold on left mouse’s button while moving the marked layers on Create a new group selection). Using the same elements and the same method described above, it’s possible to represent one more star.

 



It’s necessary also to combine in a group all the layers composing the third star, applying the already well known methods. Select the Ellipse Tool (U) to represent a small circle of white color for the last star too.



Apply for the last layer the next demonstrated parameters: Fill 20%



Make a copy of the last represented layer and use again Free Transform option to make the copy smaller and to place it in the middle of the previous layer.

 



The last made two small circles must be combined in a group too. Now we have to make the necessary number of copies of each group containing the stars and their circles. The Free Transform option will be helpful when changing the copies’ sizes if necessary and placing them the way shown next picture:



The picture is finished!

View full size here.