# gradientfill.rb

    #!/usr/local/bin/ruby18 -w
    require 'RMagick'

    # Demonstrate the GradientFill class

    Rows = 100
    Cols = 300

    Start = "#900"
    End = "#000"

    fill = Magick::GradientFill.new(0, 0, 0, Rows, Start, End)
    img = Magick::Image.new(Cols, Rows, fill);

    # Annotate the filled image with the code that created the fill.

    ann = Magick::Draw.new
    ann.annotate(img, 0,0,0,0, "GradientFill.new(0, 0, 0, #{Rows}, '#{Start}', '#{End}')") {
        self.gravity = Magick::CenterGravity
        self.fill = 'white'
        self.stroke = 'transparent'
        self.pointsize = 14
        }

    #img.display
    img.write("gradientfill.gif")
    exit

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