## {4,4}, square 1S2a + tromino 1A2
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)(2)(1 1')(3 1')(0' 2')(3' 7')(4' 6')(5')")
sublines(1)