それから（それから）— after that; then
ご飯 を 食べます。それから 寝ます。
I’ll eat. After that, I’ll go to bed.
それからそれから
after that; then
それから
accent [0]In detail
Words
ご飯gohanmeal
をo(object marker)
食べますtabemasueat (polite)
それからsorekaraafter that
寝ますnemasugo to bed (polite)
それから places the next event after the previous one. Here it makes the order explicit: eating first, going to bed afterward.
Coco-sensei