Take this instrument

and colorize the lateral sides of the circle. The color must coincide with that one of the background.

Pass to create the menu. First we should choose the instrument

with a
Radius of
10 px and represent 3 stripes.

Set next adjustments for all of them in the
Blending Options.


We need to draw a circle now with the following instrument

. Then click on the
Alt button and draw another circle inside the first one.

Set the adjustments for the circle in the
Blending Options.