#!/home/software/ruby-1.8.7/bin/ruby -w
require 'RMagick'
imgl = Magick::ImageList.new
imgl.new_image(300, 100, Magick::HatchFill.new('white','lightcyan2'))
points = [12,93.75, 37,93.75, 37,81.25, 62,81.25,
62,93.75, 87,93.75, 87,62, 112,62, 112,93.75,
137,93.75, 137,43.75, 162,43.75, 162,93.75,
187,93.75, 187,25, 212,25, 212,93.75, 237,93.75,
237,6.25, 262,6.25, 262,93.75, 287,93.75]
gc = Magick::Draw.new
gc.stroke('blue').stroke_width(3)
gc.fill_opacity(0)
gc.polyline(*points)
gc.draw(imgl)
imgl.border!(1,1, "lightcyan2")
imgl.write("polyline.gif")