Biorhythms

    5 REM biorhythms by J. Clark    from SINCLAIR USER ANNUAL-83
    6 RESTORE 
    7 BORDER RND*8
    8 PRINT AT 0,0;"        BIORHYTHMS              "
   10 INPUT "Enter Date of Birth (numerical)","Day ";a;"  Month ";b;"   Year ";c
   20 INPUT "Enter Date Now (numerical)","Month ";d;"   Year ";e
   25 CLS 
   30 LET t=INT (((e-c)*365.25)+(d-b)*30.35)-a
  800 FOR r=0 TO 255
  810 PLOT r,10
  815 IF r=INT (r/B)*B THEN FOR u=10 TO 20: PLOT r,u: NEXT u
  820 NEXT r
  830 PRINT AT 21,0;"1st     10th      20th      30th"
  840 PRINT AT 0,0; INK 1;"physical  "; INK 2;"mental  "; INK 4;"emotional"
  900 FOR r=1 TO 3
  905 READ u
  910 LET l=2*PI*(t-(INT (t/u)*u))/u
  920 LET k=2*PI*(33-u)*.03
 1000 FOR a=l TO k+l+(2*PI) STEP .1
 1010 PLOT INK ((1 AND u=23)+(2 AND u=28)+(4 AND u=33));(a-l)*(35-28+u),90+SIN a*60
 1020 NEXT a
 1030 NEXT r
 1040 DATA 23,28,33
 1050 INPUT "Again (y/n)? ";a$: IF a$(1)="y" OR a$(1)="Y" THEN GO TO 1