(let ((width 1264)
      (height 632))
  (with-chart (:line width height)
    (add-series "Rank" '((0 10) (1 18) (2 6) (3 17)))
    (add-series "25" '((0 25) (3 25)))
    (set-axis :y "Rank")
    (set-axis :x "" :data-interval 1)
    (save-file "seibel-1.png"))

  (with-chart (:line width height)
    (add-series "Rank" '((0 10) (1 18) (2 19) (3 17)))
    ;(add-series "Rank" '((0 10) (1 18) (2 6) (3 17)))
    (add-series "25" '((0 25) (3 25)))
    (set-axis :y "Rank")
    (set-axis :x "" :data-interval 1)
    (save-file "seibel-2.png")))