#! /usr/bin/ruby

# Plot random pixels.

require ‘rubygame‘

Width = 640
Height = 400

module Rubygame
    class Surface
      def put_pixel(point, color)
       self.draw_box point, point, color
     end
   end
 end

 class RandomPixels
   include Rubygame

   def initialize
     @screen = Screen.new [Width, Height]
     @events = EventQueue.new

     @screen.fill [0, 0, 0]
     @screen.update
   end

   def event_loop
     loop do
       @events.each { |event|
         case event
         when QuitEvent
           return
         end
       }

       draw
       @screen.update
     end
   end

   def draw
     point = [rand(Width), rand(Height)]
     color = [rand(255), rand(255), rand(255)]
     @screen.put_pixel point, color
   end
 end

 Rubygame.init
 RandomPixels.new.event_loop
 Rubygame.quit