define bird {[
line shaded "$1" from (0,0) to \
(10,-5) to (19,8) to (35,7) to (38,-12)+(0,2) to (60,0) to\
(75,23) to (80,40) to (52,37)+(2,2) to (74,50) to (52,50) to \
(60,60) to (38,48)+(0,2) to (35,67) to (19,68) to (10,55) to \
(0,60) to (-8,50) to (14,50) to (-8,37)+(2,2) to (20,40) to \
(15,23) to (0,0)
E: (80,40)
W: (20,40)
N: (19,68)
S: (19,8)
line outlined "gray" from (35,15) down 10 right 25
line outlined "gray" from (40,20) right 25 down 8
line outlined "gray" from (42,25) right 28 down 6
line outlined "gray" from (40,30) right 32 down 4
circle outlined "gray" rad 1 at (1,55)
circle outlined "gray" rad 4 at (24,55)
]}
ncols = 4
nrows = 4
right
for i=0 to nrows-1 do {
for j=0 to ncols-1 do { move to (j*60,-i*60)
if (i+j)%2==0 then { bird(black) } else { bird(white) }
}
}
