The samples script below shows how to use ArcPath and ClosePath. Note that none of the two radial strokes is explicitly programmed:

• the pen being in the center, ArcPath draws the radius before drawing the arc,
• since the path started from the center, ClosePath draws the radius back to the center. The junction of the two strokes is perfect. With a standard LineTo you would have to use additional settings to achieve the same effect.

The red is specified with a fourth component (opacity) lesser than 1:
{0.8, 0, 0, 0.9}
whence a transparency effect.

Import script

set r to 200
set c to {r * 1.25, r * 1.25}
BeginFigure(0)
SetPenWidth(r / 40)
SetFillColor({0.1, 0.1, 1})
CirclePath(c, r / 2)
DrawPath(3)
SetPenWidth(r / 20)
SetFillColor({0.8, 0, 0, 0.9})
MoveTo(c)
ArcPath(c, r, 0, pi / 2, false)
ClosePath()
DrawPath(3)
EndFigure()