YOU SAID:

I walked to the store to buy snacks. I ate the snacks and i walked back home

INTO JAPANESE

私は軽食を買うために店まで歩いた。おやつを食べて歩いて帰りました

BACK INTO ENGLISH

I walked to the store to buy some snacks. I ate a snack and walked home.

INTO JAPANESE

私は軽食を買うために店まで歩いた。おやつを食べて歩いて家に帰りました。

BACK INTO ENGLISH

I walked to the store to buy some snacks. I ate a snack and walked home.