1class Game
 2  def initialize(printer)
 3    @printer = printer
 4  end
 5
 6  def play(max_x, max_y)
 7    World.new(create_cells(max_x, max_y)).tap do |world|
 8      until world.empty? do
 9        @printer.display(world)
10        world.next_generation!
11      end
12    end
13  end
14
15  def create_cells(max_x, max_y)
16    items = []
17    (1..max_x).each do |x|
18      (1..max_y).each do |y|
19        items.push(Cell.new(x: x, y: y, alive: random_life))
20      end
21    end
22    items
23  end
24
25  private
26
27  def random_life
28    rand(100).even?
29  end
30end