string_random_positioning.rb

require "rubygems"
require "gosu" # sudo gem install gosu

class FontRenderingWindow < Gosu::Window
  FRAMES_BEFORE_ADDING_NEW_STRING = 90
  
  def initialize
    super(1280, 720, false)
    self.caption = "Memory Fail?"
    
    @font = Gosu::Font.new(self, "Helvetica", 72)
    @strings = Array.new
    @frames_before_next_string = FRAMES_BEFORE_ADDING_NEW_STRING
  end
  
  def button_down(id)
    if id == Gosu::Button::KbEscape then
      close
    end
  end
  
  def update
    @frames_before_next_string -= 1
    
    if @frames_before_next_string == 0
      next_string = {
        :x => rand(1280),
        :y => rand(720)
      }
      
      @strings << next_string
      @frames_before_next_string = FRAMES_BEFORE_ADDING_NEW_STRING
    end
  end
  
  def draw
    @strings.each do |str|
      @font.draw("Memory Fail?", str[:x], str[:y], 3, 1.0, 1.0, 0xffffffff)
    end
  end
end

FontRenderingWindow.new.show