YOU SAID:

red dog ate blue dog and made a purple dog

INTO JAPANESE

赤い犬は青い犬を食べて紫色の犬を作った

BACK INTO ENGLISH

A red dog eats a blue dog and made a purple dog

INTO JAPANESE

赤い犬が青い犬を食べて紫色の犬を作った

BACK INTO ENGLISH

A red dog eats a blue dog and made a purple dog