## {4,4}, square 1A1 + tromino 1S
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,1,1)
unittile(1,1,2,2,1,1,2,2)
# the Conway notation
conway("(0)(1 3)(2 1')(2 5')(0' 2')(4' 6')(3')(7')")
sublines(1)