ref: a351bcdccdf5a4273bc8dc3360a48fbb8b8aa9ea
dir: /src/black.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
void
main(int, char*argv[])
{
Rectangle rect;
Image* black;
fmtinstall('R', Rfmt);
if(initdraw(nil, nil, argv[0]) < 0)
sysfatal("initdraw: %r");
rect = screen->r;
black = display->black;
draw(screen, rect, black, nil, Pt(rect.min.x+20,rect.min.x+20));
flushimage(display, 1);
sleep(5 * 1000);
closedisplay(display);
print("rectangle was %R\n", rect);
exits(nil);
}