asd.rb

fib = Fiber.new do
  x, y = 0, 1
  loop do
    puts "before stop"
    Fiber.yield y
    puts "after stop"
    x,y = y,x+y
  end
end

#20.times { puts fib.resume }

class T
  def initialize()
  end

  def execute
    [:print, :key_read, :print].each do |m|
      self.send m
    end
  end

  def print
    puts "print"
  end

  def key_read
    @fib = Fiber.new do
      key = "enter"
      Fiber.yield key
    end
  end
end

run_time = Fiber do
  T.new.execute
end