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| Lab 
Take the example code and compile it yourself
Modify the code to interactively modify the background color. 
(Hint:  glClearColor()).  Use either the popup menus or the keyboard
(or both) to specify the background color.
Extra Credit:  Modify the "WindowDump" routine to 
display the image in a separate window. |  
 
 
 
 
 
 
 
 
 
 
 
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