I want to create a cross and circle top Shape

[Michael]

You can create an arc by calculating points along a curve, e.g.:

Curve line parameters

You could also generate a list of vertices for the polygon using code (some trigonometry) and set polygon.vertices to that value. Remember to set closeShape = False. I’m not sure that it’s simpler, but it’s more robust and flexible. Something like this (untested): center = (0, 0) # position of the circle angles = (30, 90) # angles of the slice in degrees r = 0.5 # radius, in whatever units the window uses vertices = [(r*cos(np.deg2rad(angle))+center[0], r*sin(np.deg2rad(angle))+center[1]) f…