Another thing that is wrong is that you're not using a loop to handle the button input.
Right now, your code only check the button input once.
You need to do this:
VAR B
WHILE TRUE
B=BUTTON()
IF B AND #A THEN
DO SOMETHING
ENDIF
IF B AND #B THEN
DO OTHER THING
ENDIF
WEND
1そうだね プレイ済み