## {4,4}, square 1R4 + 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)
unittile(1,1,1,1)
# the Conway notation
conway("(0 0')(1 0')(2 4')(3 4')(0'' 6')(3'' 6')(2'' 2')(1'' 2')(1' 3')(5' 7')")
sublines(1)