SLsthompson

defmodule State do
	# At each stage of computation, State builds a function.  That
	# function accepts an "initial state" as an argument and returns
	# a tuple containing a final computed value, and a final state


	# The basis of State accepts a value and returns a function.
	# The function returned accepts a state and returns a tuple with the
	# value and the state.
	def unit(value) do