## {4,4}, square 1R4 + tromino 1F
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 0')(1 0')(2 0')(3 0')(1' 7')(2' 4')(3')(5' 6')")
sublines(1)