YOU SAID:

Back and forth forever until useless.

INTO JAPANESE

無駄になるまで永遠に行ったり来たり。

BACK INTO ENGLISH

Go back and forth forever until it is wasted.

INTO JAPANESE

無駄になるまで永遠に行き来します。

BACK INTO ENGLISH

I will come and go forever until it is wasted.

INTO JAPANESE

それが無駄になるまで、私は行き来します。

BACK INTO ENGLISH

I will come and go until it is wasted.

INTO JAPANESE

無駄になるまで行きます。

BACK INTO ENGLISH

I will go until it is wasted.

INTO JAPANESE

それが無駄になるまで私は行きます。

BACK INTO ENGLISH

I will go until it is wasted.