30 T=TIME :Y=2000:M=INT (T/1E4):T=T-M*1E4:D=INT (T/1E2)
   40 L=-50
   50 WAIT 0
   60 CLS : PRINT "Year (";STR$ Y;") ";: INPUT Y
   70 CLS : PRINT "Month (";STR$ M;") ";: INPUT M
   80 CLS : PRINT "Day (";STR$ D;") ";: INPUT D
   90 CLS : WAIT 
  110 J=INT (365.2422*Y+30.44*(M-1)+D+1)
  120 N=M-2+12*(M<3)
  130 Z=Y-(M<3)
  140 E=INT (Z/100)
  150 Z=Z-100*E
  160 W=INT (2.61*N-.2)+D+Z+INT (Z/4)+INT (E/4)-2*E
  170 W=W-7*INT (W/7)
  180 X=J-7*INT (J/7)
  190 J=J-X+W-7*(X<W)+1721061
  210 P=(J+4.867)/29.53058
  220 P=2*(P-INT P)-1
  230 N=ABS P
  240 Q=INT (N*100+.5)
  250 CLS : PRINT "Moon lit about";Q;"%"
  260 Z$="full": IF P<0 LET Z$="new"
  270 CLS : PRINT "Headed for a ";Z$;" moon."
  290 IF PEEK &A000<>&C0 END
  300 WAIT 0:P$="Y": PRINT "Print output (Y/N) ";: INPUT P$
  310 IF P$<>"Y" END
  320 "MPRINT" CLS : PRINT "Latitude (";STR$ L;") ";: INPUT L
  330 IF L<-90 LET L=-90
  340 IF L>90 LET L=90
  360 CLS : PRINT "Printing...": WAIT 
  380 M$=STR$ M: IF M<10 LET M$="0"+M$
  390 D$=STR$ D: IF D<10 LET D$="0"+D$
  400 TEXT : CSIZE 3: LPRINT STR$ Y;"-";M$;"-";D$
  410 GRAPH : GLCURSOR (216/2,-216/2+15): SORGN :R=108: DEGREE 
  420 C=9: FOR A=0 TO 360 STEP 6
  430 LINE -(R*SIN (A),R*COS (A)),C
  440 C=0: NEXT A
  450 V=N*2:C0=9:C1=0
  460 IF P>=0 LET V=2-V:C0=0:C1=9
  470 FOR S=1 TO 2:C=9
  480 FOR I=-R TO R STEP 8
  490 XO=I*COS (-L):YO=I*SIN (-L)
  500 W=√(R*R-I*I)
  510 XN=W*SIN (L):YN=W*COS (L)
  520 X=XO-XN+V*XN:Y=YO-YN+V*YN
  530 IF S=1 LINE -(X,Y),C:C=0
  540 IF S=2 GLCURSOR (XO-XN,YO-YN): LINE -(X,Y),C0: LINE -(XO+XN,YO+YN),C1
  550 NEXT I: NEXT S
  560 GLCURSOR (-216/2,-216/2-25): SORGN 
  710 TEXT : CSIZE 2: LPRINT "Moon is lit about"
  720 LPRINT STR$ Q;"% and headed"
  730 LPRINT "for a ";Z$;" moon."
  740 LF 3: END