CIRCLE x, y, r [,lw] [, a] [, c] [, fill]
Draw a circle on the video output centered at ‘x’ and ‘y’ with a radius of ‘r’ on the attached LCD panel. ‘c’ is the optional color and defaults to the current foreground color if not specified.
The optional ‘a’ is a floating point number which will define the aspect ratio.
If the aspect is not specified the default is 1.0 which gives a standard circle ‘fill’ is the fill color. It can be omitted or set to -1 in which case the box will not be filled.