#!/usr/bin/ruby
# The MIT License
# 
# Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.



# width of the band
$u=20
$uu=$u*2

def make(step,color)
  system "convert -size #{$uu}x8 xc:white -fill '#{color}' -stroke '#{color}' -draw \"polyline 0,#{$u-1} #{$u-1},0 #{$uu-1},0 #{$u},#{$u-1}\" -roll +#{step}+0  screen.#{step}.gif" or fail
end

colors = { "red" => "#cc0000", "blue" => "#3465a4" }
colors.keys.each do |name|
  list = []
  color = colors[name];
  
  (0...$uu).each do |i|
    make(i,color)
    list << "screen.#{i}.gif"
  end

  system "convert -delay 10 #{list.join(" ")} -loop 0 progress-unknown-#{name}.gif" or fail
  
  list.each do |file|
    File.delete(file)
  end
end