lcd.invertRect(x, y, w, h [, flags])
Invert a rectangle zone from top left corner (x,y) of specified width and height
@status current Introduced in 2.8.0
Parameters
x,y
(positive numbers) top left corner positionw
(number) width in pixelsh
(number) height in pixelsflags
(optional) please see Lcd functions overview
Return value
none