function box(x,y)
%BOX	box(x,y)
%	Draw a box low level object to the figure window.
%	
%	Example:
%	box(600:700,350:450);

line([min(y) min(y)],[min(x) max(x)]);
line([min(y) max(y)],[max(x) max(x)]);
line([max(y) max(y)],[max(x) min(x)]);
line([max(y) min(y)],[min(x) min(x)]);