erase-box-x-y

Arguments: stream left top right bottom

Erases a rectangle on stream from an upper-left position at (left, top) to a lower-right position at (right, bottom). (Erasing means drawing in the stream's background-color.) stream should be a graphical-stream. The other arguments should be integers. To use a box object rather than individaul coordinates, see draw-box.

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Created 2019.8.20.