The fabric teachpack provides the following images and functions.  The
color arguments should be symbols of color names (such as 'red or
'teal).  The list of known colors is huge and includes all the
standard color names.

IMAGES (use the names given here to refer to the images)

  tshirt
  hat 
  worm 
  chili
  flower
  taxi
  
FUNCTIONS TO CREATE FABRIC

  ;; create-solid-fabric : color number number -> image
  ;; produces solid color image with given width and height
  
  ;; add-print : image image -> image
  ;; overlays tiles of first image onto second image 
  ;; requires dimensions of first image to be no larger than those of second image
  
  ;; add-horiz-stripe : color number image -> image
  ;; overlays horizontal stripe of given color and height on given image
  
  ;; add-vertical-stripe : color number image -> image
  ;; overlays vertical stripe of given color and width on given image 

FUNCTIONS TO ALIGN IMAGES

  ;; move-pinhole-center : image -> image
  ;; returns given image with pinhole at image center

  ;; move-pinhole-topleft : image -> image
  ;; returns given image with pinhole at top left corner (0,0)

  Note: the functions for moving pinholes are useful for the
  stack-logos and side-by-side-logos exercises.  DrScheme's overlay-xy
  function leaves the pinhole as that of the first image; it does not
  center the pinhole on the combined image.  Centering the pinhole on
  these logos problems makes it easier to add a combined logo to a
  clothing item.