to exe10.a
repeat 10[fd 20 rt 90 fd 20 lt 90]
end

to exe10.b
repeat 5[fd 50 rt 90 fd 50 lt 90]
end

to exe10.c
repeat 20[fd 10 rt 90 fd 10 lt 90]
end

to exe6.square
repeat 4[fd 75 lt 90]
end

to exe7.hexagon
repeat 6[fd 50 rt 60]
end

to exe8
repeat 4[fd 200 rt 90]
end

to exe9.triangle
repeat 3[fd 100 rt 120]
end