Generate animated gif with ruby + rmagick

00-100-colours.gif

run.rb

require "rubygems"
require "rmagick"
include Magick

frames = 100
   gif = ImageList.new

frames.times do |i|
  colour = "#"; 3.times {
    colour << "%02X" % (rand * 256)
  }
  gif << Image.new(130,50).color_fill_to_border(1, 1, colour)
end

gif.write("00-#{frames}-colours.gif")