POINT
=====

Function
--------

**POINT** returns the 'colour' of the specified pixel.

Syntax
------

A = POINT (X,Y)

Example
-------

::

   10 REM Invert the graphics screen
   20 FOR X = 0 TO 239
   30 FOR Y = 0 TO 63
   40 IF POINT(X,Y) = 1 THEN PRESET (X,Y) ELSE PSET (X,Y)
   50 NEXT Y:NEXT X

Remarks
-------

An odd number returned by the function indicates a black pixel, while an
even number indicates a white pixel. If the co-ordinates are out of
range then -1 is returned.