#!/usr/bin/env ruby
require "mojo_magick"

MojoMagick.convert(nil, "animated.gif") do |c|
  c.size "200x200"
  c.delay 100
  c.image_block do # first layer
    c.background "blue"
    c.fill "white"
    c.gravity "northwest"
    c.label "NW"
  end
  c.image_block do # second layer
    c.background "transparent"
    c.fill "red"
    c.gravity "southeast"
    c.label "SE"
  end
end