time for the game of lief
failing test
passing test
fail for overpopulation
pass for overpopulation
failing test for live on
pass for live on
refactor
failing test for genesis
passing test
exhaustive test for all input types
improve messaging
show that its now exhaustively defined
failing test case for the grid
grid test passes
not possible to read cells
can now 'read' cells
can't set cells
still can't set cells
can now set cells