(50G) Yes or no

[CosmicTruth]

here is what I have now for YN for 50G.

Code:

%%HP: T(3)A(D)F(.);
\<< CLLCD "?
Yes or No" + 1 DISP { "YES" "" "" "" "" "NO" } TMENU
  DO -1 WAIT
  UNTIL { 16.1 42.1 102.1 64.1 11.1 92.1 } SWAP POS
    IF DUP
    THEN 3.1 - 1
    ELSE 1500 .1 BEEP
    END
  END 0 MENU SIGN \-> X 'X>0'
\>>

takes a string then asks for Y or N, Yes or No, 0 or 1 and returns 0 for no 1 for yes.
crude, imperfect, but it works.