YOU SAID:

I was riding a unicorn then I stopped to eat some grass and continued to ride my unicorn

INTO JAPANESE

私はユニコーンに乗っていたが、草を食べるために立ち止まり、ユニコーンに乗り続けた

BACK INTO ENGLISH

I was riding a unicorn, then stopped to eat grass and continued riding the unicorn

INTO JAPANESE

私はユニコーンに乗っていましたが、草を食べるために立ち止まり、ユニコーンに乗り続けました

BACK INTO ENGLISH

I was riding a unicorn and stopped to eat grass and continued riding the unicorn

INTO JAPANESE

私はユニコーンに乗っていましたが、草を食べるために立ち止まり、ユニコーンに乗り続けました

BACK INTO ENGLISH

I was riding a unicorn and stopped to eat grass and continued riding the unicorn