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

    i = Magick::ImageList.new
    i.new_image(250, 250, Magick::HatchFill.new('light cyan'))

    scale1 = Magick::Draw.new
    scale1.stroke('red')
    scale1.stroke_width(2)

    # Draw y axis
    scale1.line(0, 0, 0, 249)
    scale1.line(0, 249, 10, 239)

    # Draw x axis
    scale1.line(0, 0, 249, 0)
    scale1.line(249, 0, 239, 10)

    # Add labels
    scale1.fill('black')
    scale1.stroke('transparent')
    scale1.text(8, 15, "'0,0'")
    scale1.text(233, 16, "x")
    scale1.text(12, 237, "y")

    # Draw circle at default scale.
    scale1.stroke('black')
    scale1.stroke_width(1)
    scale1.fill('white')
    scale1.circle(124.5, 124.5, 124.5, 149.5)

    # Label the circle.
    scale1.stroke('transparent')
    scale1.fill('black')
    scale1.text(108, 128.5, "'1.0,1.0'")

    scale1.draw(i)

    # Make a new draw object for the scale operation
    scale2 = Magick::Draw.new

    # Change the scale, draw the circle
    # and the label at the same coordinates.
    scale2.scale(1.5, 1.25)
    scale2.stroke('black')
    scale2.fill('yellow')
    scale2.circle(124.5, 124.5, 124.5, 149.5)
    scale2.stroke('transparent')
    scale2.fill('black')
    scale2.text(108, 128.5, "'1.5,1.25'")

    scale2.draw(i)

    #i.display
    i.write("scale.gif")
    exit