SETSCREENCOLORcolor
SETSCREENCOLOURcolor
SETSCcolor
Sets the screen background color to color
and changes the entire screen to that color.
The color
input may either be a color index or a color vector.
A color index is a number from 0 - 15.
A color vector is a list of [red green blue] intensities, each in the range of 0 - 255.
For an explanation of the color
input, see the section on Using Color.
SETSCREENCOLOR [0 0 0]
SETPENCOLOR [255 255 255]
REPEAT 4 [FORWARD 100 RIGHT 90]
CLEAN