I can imagine something like
Get a circle on the layout, with its origin point in the center. (add more circles for the 1* value, double, triple, etc)
Put a thin black sprite on the layout with its origin at the bottom and height half of that of the circle width.
On layout start, set thin sprite to image point 0 of the circle.
while x < 20
add 1 to x
circle spawn thin sprite with angle (360 / 20) * x
this wil get you the circle with the parts.
should get you on your way I supose :)