Airfoil has holes in it

[kll]

looks impressive,
can you tell me why you need to do 60 little shapes instead
one shape with the for …60 vertex inside?
and if you miss the last point ( = first point ) could do a
endShape(CLOSE);

and for the structure, see

How to close a PShape with 2 arcs and two lines

good, thanks @jeremydouglass , but doing the outline is only one question, how can a group ( of shapes ( even if closed )) be treated like a closed shape and filled?? PShape l1,l2,l3,l4,all; int w=100; void setup(){ size(300,300); all = createShape(GROUP); l1 = createShape(LINE,0,0,w,0); l2 = createShape(LINE,w,0,w,w); l3 = createShape(LINE,w,w,0,w); l4 = createShape(LINE,0,w,0,0); all.addChild(l1); all.addChild(l2); all.addChild(l3); all.addChild(l4); //all.fill(0,200,0); // …

can do a create shape in setup and a
draw shape ( width/2.height/2) in draw,
so no need to do that absolute in the create shape