gistfile1.txt

#! /usr/bin/ruby

# Plot random pixels.
require 'rubygems'
require 'rubygame'
include Rubygame

Width = 640
Height = 400

class RandomPixels

  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.set_at point, color
  end
end

Rubygame.init
RandomPixels.new.event_loop
Rubygame.quit