roulette.rb

def roulette(bet, total)
  unless total < bet
    total -= bet
    color = choose_color
    if color == "black" 
      return bet * 2 + total
    else
      return roulette(bet * 2, total)
    end
  end
  return total
end

def choose_color
  wheel = (0..36).to_a << 0
  spin = wheel.sample
  spin.odd? ? "black" : "red"
end

puts roulette(5, 300)