The following is an abridged list of just a few of the com-
        mands that are most commonly used by beginning Digi-Doodlers:
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Command:                     Description:
--------                     ------------

circle (x,y,r)               Draws a circle of radius r centered at location (x,y)

cls (color)                  Clears the screen to the specified color

color (color)                Specifies the color to be used for drawing lines,
                             circles, etc.

cuckoo                       Plays a "cuckoo" sound through the speaker

delay (milliseconds)         Delays for the specified number of milliseconds

drip                         Plays a "drip" sound through the speaker

frame                        Draws a gray frame around the edge of the screen

honk                         Plays a "honk" sound through the speaker

line (a,b,x,y)               Draws a straight line from location (a,b) to
                             location (x,y)

oval (x,y,a,b)               Draws an oval centered at location (x,y)

pop                          Plays a "pop" sound through the speaker

quit                         Terminates execution of the Digi-Doodle

rattle                       Plays a "rattle" sound through the speaker

rectangle (xul,yul,xlr,ylr)  Draws a rectangle whose upper left-hand corner is
                             located at (xul,yul) and whose lower right-hand
                             corner is located at (xlr,ylr)

snip                         Plays a "snip" sound through the speaker

square (x,y,r)               Draws a square of radius r centered at location (x,y)

triangle (a,b,c,d,e,f)       Draws a triangle with vertices at (a,b) and (c,d)
                             and (e,f)

twing                        Plays a "twing" sound through the speaker

waitkey                      Waits for any key on the keyboard to be pressed.

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explode (x,y) @toys          Creates a brief explosion at location (x,y)

rocket (x,y,color) @toys     Draws a rocket at location (x,y)

stars @toys                  Creates a background field of stars

ufo (x,y,color) @toys        Draws a flying saucer at location (x,y)
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