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

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

    gc = Magick::Draw.new

    # Draw 3 lines in 3 colors.
    # Make each line 2 pixels wide.
    gc.stroke('red')
    gc.stroke_width(2)
    gc.line(50,50, 50,200)
    gc.stroke('blue')
    gc.line(50,200, 200,200)
    gc.stroke('green')
    gc.line(200,200, 50,50)

    # Identify the endpoints with gray circles
    gc.stroke('gray50')
    gc.stroke_width(1)
    gc.fill_opacity(0)
    gc.circle(50,50, 53,53)
    gc.circle(50,200, 53,203)
    gc.circle(200,200, 203,203)

    # Annotate the endpoints
    gc.fill('black')
    gc.stroke('transparent')
    gc.text(30,40, "'50,50'")
    gc.text(30,220, "'50,200'")
    gc.text(180, 220, "'200,200'")

    gc.draw(i)
    #i.display
    i.write("line.gif")