YOU SAID:
I pat a red cat in black hat next to orange bat with a blue mat that is really fat
INTO JAPANESE
私は本当に太っている青いマットでオレンジ色のコウモリの隣に黒い帽子をかぶった赤い猫をなでます
BACK INTO ENGLISH
I'm stroking a red cat in a black hat next to an orange bat on a really fat blue mat
INTO JAPANESE
私は本当に太った青いマットの上でオレンジ色のコウモリの隣にある黒い帽子で赤い猫を撫でています
BACK INTO ENGLISH
I'm stroking a red cat in a black hat next to an orange bat on a really fat blue mat
That didn't even make that much sense in English.