YOU SAID:

then it stop being black!

INTO JAPANESE

それからそれは黒くなるのをやめます！

BACK INTO ENGLISH

Then it stops turning black!

INTO JAPANESE

その後、黒くなるのをやめます！

BACK INTO ENGLISH

Then stop turning black!

INTO JAPANESE

その後、黒くなるのをやめなさい！

BACK INTO ENGLISH

Then stop turning black!