need help please[HOpenGL]

[enache alex]

hello ; I am learning to use to HOpenGL to complete an asignement for next week and I have some trouble ; I have found a tutorial on the internet ; in that tutorial it was an example of the Rubik's Cube ; anyway ; in that example it was used a function called matrixExcursion ; and when I try to run the example it sais that :
  "
  ERROR file:.\RubikFace.hs:9 - Undefined variable "matrixExcursion"
  "
  I don't know what to do ; please help ; I need to know immediatly how to fix this problem ; thanks for your time in reading this , and hope to hear from you soon ; I wish you all the best

		
---------------------------------
How low will we go? Check out Yahoo! Messenger’s low  PC-to-Phone call rates.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.haskell.org//pipermail/haskell-prime/attachments/20060422/0f7e663f/attachment.htm