In my way doing, i took series of lines(alternate green & blue) with stroke around 6pt on top of a Rectangle box(red).
Next selected Blue lines (changed to expand both lines)...
While both lines(Blue colour one) + box selcted...click on Minus in pathfinder.
Tht's it now change the red color to green :) :) Now you can insert this strecture into any Round circles :).
Hopw it helps you.