YOU SAID:
The cat white is with black spot
INTO JAPANESE
猫の白は黒い斑点がある
BACK INTO ENGLISH
Cat white has black spots
INTO JAPANESE
猫の白に黒い斑点がある
BACK INTO ENGLISH
Cat has black spots on white
INTO JAPANESE
猫は白地に黒い斑点があります
BACK INTO ENGLISH
Cat has black spots on white background
INTO JAPANESE
猫は白い背景に黒い斑点があります
BACK INTO ENGLISH
Cat has black spots on white background
That didn't even make that much sense in English.