BOX x1, y1, w, h [, lw] [,c] [,fill]
Draws a box starting at x1 and y1 which is w pixels wide and h pixels high on the attached LCD panel.
‘lw’ is the width of the sides of the box and can be zero. It defaults to 1.
‘c’ specifies the color and defaults to the default foreground color if not specified.
‘fill’ is the fill color. It can be omitted or set to -1 in which case the box will not be filled.