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## Index

`#/return`
  Keyboard Operations
Butterfly Attractor
  Turtles
`change-color`
  Color Operations
`clear`
  Turtles, Turtles
`clear-ellipse`
  Ellipses
`clear-line`
  Lines
`clear-pixel`
  Pixels
`clear-polygon`
  Polygons
`clear-rectangle`
  Rectangles
`clear-solid-ellipse`
  Ellipses
`clear-solid-polygon`
  Polygons
`clear-solid-rectangle`
  Rectangles
`clear-string`
  Strings
`clear-viewport`
  Viewports
`close-graphics`
  Basic Commands
`close-viewport`
  Basic Commands
`copy-viewport`
  Viewports
`default-display-is-color?`
  Color Operations
`draw`
  Turtles
`draw-ellipse`
  Ellipses
`draw-line`
  Lines
`draw-offset`
  Turtles
`draw-pixel`
  Pixels
`draw-pixmap`
  Pixmaps
`draw-pixmap-posn`
  Pixmaps
`draw-polygon`
  Polygons
`draw-rectangle`
  Rectangles
`draw-solid-ellipse`
  Ellipses
`draw-solid-polygon`
  Polygons
`draw-solid-rectangle`
  Rectangles
`draw-string`
  Strings
`draw-viewport`
  Viewports
`erase`
  Turtles
`erase-offset`
  Turtles
Fern Fractal
  Turtles
`flip-ellipse`
  Ellipses
`flip-line`
  Lines
`flip-pixel`
  Pixels
`flip-polygon`
  Polygons
`flip-rectangle`
  Rectangles
`flip-solid-ellipse`
  Ellipses
`flip-solid-polygon`
  Polygons
`flip-solid-rectangle`
  Rectangles
`flip-string`
  Strings
`flip-viewport`
  Viewports
`get-color-pixel`
  Position Operations
`get-key-press`
  Keyboard Operations
`get-mouse-click`
  Mouse Operations
`get-pixel`
  Position Operations
`get-string-size`
  Miscellaneous Operations
graphics
  simple
    Viewport Graphics
graphics.ss graphicr.ss graphicss.ss graphicspr.ss
  Viewport Graphics
`key-value`
  Keyboard Operations
Koch Snowflake
  Turtles
`left-mouse-click?`
  Mouse Operations
Lorenz Attractor
  Turtles
`make-posn`
  Position Operations
`make-rgb`
  Color Operations
`middle-mouse-click?`
  Mouse Operations
`mouse-click-posn`
  Mouse Operations
`move`
  Turtles
`move-offset`
  Turtles
`open-graphics`
  Basic Commands
`open-pixmap`
  Basic Commands
`open-viewport`
  Basic Commands
Peano space-filling curve
  Turtles
`posn-x`
  Position Operations
`posn?`
  Position Operations
`query-mouse-posn`
  Mouse Operations
`ready-key-press`
  Keyboard Operations
`ready-mouse-click`
  Mouse Operations
`ready-mouse-release`
  Mouse Operations
`rgb-red`
  Color Operations
`rgb?`
  Color Operations
`right-mouse-click?`
  Mouse Operations
Serpinski Triangle
  Turtles
`split`
  Turtles
`split*`
  Turtles
`test-pixel`
  Position Operations
`tprompt`
  Turtles
`turn`
  Turtles, Turtles
`turtles`
  Turtles
viewport
  Viewport Graphics
`viewport->snip`
  Miscellaneous Operations
`viewport-flush-input`
  Mouse Operations, Keyboard Operations