YOU SAID:

I'm so angry I killed my dog until my gramps saw. then he joined in the fun and now were covered in blood

INTO JAPANESE

私はとても腹が立って、おじいちゃんが見るまで犬を殺しました。それから彼はその楽しみに参加し、今では血まみれになっていました

BACK INTO ENGLISH

I got so angry that I killed the dog until Grandpa saw it. Then he joined in the fun and was now covered in blood

INTO JAPANESE

私はとても腹が立ったので、おじいちゃんが見るまで犬を殺しました。それから彼はその楽しみに参加し、今では血まみれになっていました

BACK INTO ENGLISH

I got so angry that I killed the dog until Grandpa saw it. Then he joined in the fun and was now covered in blood