This is a really basic program to put up a 1-plane black screen.  I
wrote it after reading on the Imagine Mailing List that having the
Image screen in front while rendering can slow things down.  Someone
suggested putting up a 1-plane black screen to eak a bit more speed
out of things.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 3047    4860  62.7% -lh5- d62d Jan 22  1994 BlackScreen
[generic]                  598    1292  46.3% -lh5- 28e3 Jan 22  1994 BlackScreen.c
[generic]                  213     463  46.0% -lh5- e2e4 Jan 22  1994 BlackScreen.c.info
[generic]                  535     924  57.9% -lh5- 7043 Jan 22  1994 BlackScreen.doc
[generic]                  215     463  46.4% -lh5- 247e Jan 22  1994 BlackScreen.doc.info
[generic]                  391     835  46.8% -lh5- 5a74 Jan 22  1994 BlackScreen.info
[generic]                  522     912  57.2% -lh5- fe31 Jan 22  1994 BlackScreen.o
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         7 files    5521    9749  56.6%            Jan 24  1994