Plot
    ---------------------
    Different to basic
     
     
    Similar to BBC Basic but is now affected by the Output keyword.
     
    Syntax is: Plot expr%,x%,y%
     
    Where: expr% is the plot number in the range from 0 to 255,
    for example 85 is the plot number for absolute triangle plot in
    the foreground colour. x% and y% are the x and y co-ordinates
    respectively in the range -32768 to +32767.
     
    Example:
    Rem Draw a triangle
    Plot 50,100,100
    Rem Plot a single point
    Plot 69,x,y
     
    For further info about Graphics in WimpBasic click here.
     
    Other keywords in the Graphics category.