Press Green flag and follow the instructions. This project is part of #GettingUnstuck initiative #CreativeComputing, Day 17 "Create a project that asks the user to type in multiple words or numbers, stores the items in a list, then does something interesting with the items from the list" Type numbers and, once done, type "DONE" in the textbox. This program will calculate average and max number (it should be easy to remix and calculate minimum number!)
Sprite taken from the Scratch repository.