CLS will clear the screen using a specified or current background color
INK will set the current foreground and background ink color
DOT will put a pixel on the screen in the current ink color
BOX will draw a filled box on screen in the current ink color
LINE will draw a line on screen using the current ink color
CIRCLE will draw a circle on screen using the current ink color
ELLIPSE will draw a ellipse on screen using the current ink color
The next commands will return a result:
POINT() will return the color of a pixel on the screen
RGB() will generate color value using Red Green Blue components