790 PRINT "The BLACK BOX is an 8 X 8 square in":PRINT "which several atoms are hidden.":PRINT
800 PRINT "The object of the game is to discover"
810 PRINT "the position of the atoms by projecting"
820 PRINT "rays at them from the sides of the box":PRINT "and noticing how these rays react.":PRINT
830 PRINT "Rays may be deflected, reflected, or":PRINT "absorbed by the atoms in the box.":PRINT:PRINT "You send rays into the box from any of"
840 PRINT "32 spots along the sides of the box."
850 SCREEN 0,0,0,0:GOSUB 1020:SCREEN 0,0,1,0:CLS
860 PRINT "The path of a ray is governed by the":PRINT "following rules:":PRINT
870 PRINT "A rays that strikes an atom directly is":PRINT "absorbed.":PRINT
880 PRINT "A ray that hits an atom to one side is"
890 PRINT "diverted 90 degrees to that side.":PRINT
900 PRINT "A ray aimed between two atoms one":PRINT "square apart is reflected.":PRINT
910 PRINT "Rays otherwise travel in straight lines."
920 PRINT:PRINT "You will be told whether the ray hits":PRINT "an atom, is reflected, or comes out."
930 PRINT "If the ray comes out, you'll be told":PRINT "where.":PRINT
940 SCREEN 0,0,1,1:GOSUB 1020:SCREEN 0,0,0,1:CLS
950 PRINT "You begin by specifing how many atoms"
960 PRINT "are to be in the BLACK BOX."
970 PRINT:PRINT "At any time you may guess an atom's"
980 PRINT "location by pressing RETURN rather than":PRINT "entering one of the spot numbers."
990 PRINT "Then move the blinking cursor to the":PRINT "place where you believe an atom to be":PRINT "and press the '5' key on the keypad."
1000 PRINT:PRINT "Press the RETURN key to return to":PRINT "shooting rays.":PRINT:PRINT "You begin with a high score which":PRINT "decreases with each additional clue you":PRINT "need to solve the BLACK BOX."
1010 SCREEN 0,0,0,0:GOSUB 1020:RETURN
1020 LOCATE 25,1:PRINT " Press any key to continue. ";:LOCATE 1,1