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#!/usr/bin/env ruby
require "GD"
# create a new image
im = GD::Image.new(100,100)
# allocate some colors
white = im.colorAllocate(255,255,255)
black = im.colorAllocate(0,0,0)
red = im.colorAllocate(255,0,0)
blue = im.colorAllocate(0,0,255)
# make the background transparent and interlaced
im.transparent(white)
im.interlace = true
# Put a black frame around the picture
im.rectangle(0,0,99,99,black)
# Draw a blue oval
im.arc(50,50,95,75,0,360,blue)
# And fill it with red
im.fill(50,50,red)
# Convert the image to PNG and print it on standard output
im.png STDOUT
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