gistfile1.rb

class App
  class << self
    def animate(frames, seconds)
      frame = 0;
      advance = 1;

      frames_per_second = frames.size * 2;
      total_frames = frames_per_second * seconds;

      total_frames.times do
        puts "\e[H\e[2J" # clears the screen
        puts frames[frame]

        frame += advance;
        advance *= -1 if frame == 0 or frame == frames.size - 1;
        sleep(1.0/(frames.size*2.0))
      end
    end

    def run
      animation = [ "8m===D", "8=m==D", "8==m=D", "8===mD" ]
      ending    = [ "8m===Do", "8=m==D~o", "8==m=D ~o", "8===mD" ]

      animate(animation, 4)
      animate(ending, 2)
    end
  end
end

App.run