Red: it should roll a gutter game
Green: it can roll a gutter game
Green: it can roll all ones. Had to initialize to work
Refactore: extract roll_many
Red: it should roll a spare
Red: still red for spare. @rolls works for prior
Green: rolls a spare... like a boss
Refactor: roll_spare
Refactor: i to first in frame
Red then Green: rolls a strike... like a boss
Refactor: spare?
Refactor: strike?
Refactor: spare_bonus_ball
Refactor: strike_bonus_ball
Refactor: two_balls_in_frame