loading.rb

require  'rmagick'
include Magick

Rows = 500
Cols = 500
$i = 0
loading = ImageList.new
while $i < 360 do
	frame = Image.new(Cols, Rows) do |c|
		c.background_color = "white"
	end

	circle = Draw.new
	circle.fill_opacity(0)
	circle.stroke_width(10)
	circle.stroke("green")
	circle.stroke_opacity(0.5)
	if($i <= 180) then
		circle.ellipse(frame.rows/2, frame.columns/2, 25, 25, 0, $i*2)
	
	else
		circle.ellipse(frame.rows/2, frame.columns/2, 25, 25, $i*2-360, 360)
	end
	circle.draw(frame)

	loading << frame.copy
	$i = $i + 10
	loading.delay = 0.1
end


loading.write("loading.gif")