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PolygonMorph method shapeFromPen:
Last updated at 9:12 pm UTC on 3 December 2017
Draw an empty regular polygon. This example uses the shapeFromPen method. Pen graphics are based on the concepts known from LOGO:

 (PolygonMorph
    shapeFromPen: [:p | 12 timesRepeat: [p go:50. p turn:30.]]
       color: Color transparent borderWidth: 4 borderColor: Color blue)
   openInHand

PolygonMorph_shapeFromPen_2017-03-08.png

see also
forward: and turn: in Morph