SETPEN characteristics

Sets the pen's position, mode, and hardware-dependent characteristics according to the information in the characteristics input. The characteristics input is a list with the following members: [PENDOWNP PENMODE PENSIZE PENCOLOR PENPAINT]. The format of this list may change in futures version of FMSLogo, as additional pen characteristics are added. To guarantee portability, the input should be taken from an earlier invocation of PEN.

CLEARSCREEN
REPEAT 4 [FORWARD 100 RIGHT 90]
MAKE "savepen PEN

CLEARSCREEN
SETPENSIZE [20 20]
REPEAT 4 [FORWARD 100 RIGHT 90]
SETPEN :savepen

CLEARSCREEN
REPEAT 4 [FORWARD 100 RIGHT 90]