'       BASIC exercise no. 21

'This program contains a request to a SUB routine to output an emergrency
'message on the screen.  However, the SUB routine has not been created yet.
CLS
SCREEN 9
WINDOW (0, 0)-(1000, 800)
emergency


'1. Create a new SUB called emergency  (Edit menu)
'2. Enter the following between the title instruction (SUB diagonal)
'   and the last line (END SUB):
'     PRINT" Emergency - Emergency"
'3. Run the program and see if it works.