PATTERN outputs a number which represents the current fill pattern of the graphics screen.
To set the fill pattern of the graphics screen, use SETPATTERN.
The available fill patterns are:
If SETPATTERN was called with a user defined pattern (a list of eight numbers between 0 and 255), PATTERN outputs this list.
Example? REPEAT 2[FD 20 \
? RT 90 FD 60 RT 90]
? SETPATTERN 8
? FD 20 RT 90 FD \
? 20 PD