Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sandwich making. The user needs to make a sandwich. A piece of bread needs to be picked, the peanut butter jar needs to be opened, peanut butter and jelly need to be spread using the knife, and finally a second piece of bread needs to be added. Left: start state. Right: the state before adding the second piece of bread.
