YOU SAID:

today i did something terrible for 50 minutes before i did something behind my back 15 minutes later

INTO JAPANESE

今日、私は50分間ひどいことをした後、15分後に背中の後ろで何かをしました

BACK INTO ENGLISH

Today I did something terrible for 50 minutes then did something behind my back after 15 minutes

INTO JAPANESE

今日、私は50分間ひどいことをし、15分後に背中の後ろで何かをしました

BACK INTO ENGLISH

Today I did something terrible for 50 minutes and did something behind my back after 15 minutes

INTO JAPANESE

今日、私は50分間ひどいことをし、15分後に後ろで何かをしました

BACK INTO ENGLISH

Today I did something terrible for 50 minutes and did something behind 15 minutes later

INTO JAPANESE

今日、私は50分間ひどいことをし、15分後に何かをしました

BACK INTO ENGLISH

Today I did something terrible for 50 minutes and did something after 15 minutes

INTO JAPANESE

今日、私は50分間ひどいことをし、15分後に何かをしました

BACK INTO ENGLISH

Today I did something terrible for 50 minutes and did something after 15 minutes