③306行目と307行目の間に
@_STN
SIZ_=ZS(ZM)
IF SIZ_!=2 THEN SIZ_=SIZ_+1
GPUTCHR TCHX,TCHY,"BGF0",FNO,0,SIZ_
@_TCHK
IF TCHST==0 THEN RETURN
GOTO @_TCHK
④41行目と42行目の間に
IF B==33 AND OLDB!=33 THEN FNO=FNO+1
IF B==34 AND OLDB!=34 THEN FNO=FNO-1
IF FNO>255 THEN FNO=0
IF FNO<0 THEN FNO=255
LOCATE 9,13:PRINT FNO;"(スペース×２)";
