# pattern1.rb

    #!/usr/local/bin/ruby18 -w

    require 'RMagick'

    gc = Magick::Draw.new
    gc.pattern('triangles', 0, 0, 16, 16) {
        gc.fill('darkblue')
        gc.rectangle(0,0, 16,16)
        gc.fill('yellow')
        gc.stroke('red')
        gc.polygon(0,0, 8,16, 16,0, 0,0)
    }

    gc.stroke('triangles')
    gc.stroke_width(16)
    gc.fill('none')
    gc.ellipse(150, 75, 130, 60, 0, 360)

    img = Magick::Image.new(300, 150, Magick::HatchFill.new('white','lightcyan2',8))
    gc.draw(img)

    img.border!(1,1, "lightcyan2")

    img.write('pattern1.gif')
    exit

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