YOU SAID:

you need to was for 20 seconds atleast

INTO JAPANESE

あなたがする必要があるのは少なくとも20秒間でした

BACK INTO ENGLISH

All you had to do was at least 20 seconds

INTO JAPANESE

あなたがしなければならなかったのは少なくとも20秒でした

BACK INTO ENGLISH

You had to do at least 20 seconds

INTO JAPANESE

あなたは少なくとも20秒をしなければなりませんでした

BACK INTO ENGLISH

You had to do at least 20 seconds