This section is to help you understand the machine model some more, so that you don't get frustrated as you're working on your own projects. There are some subtleties when the same message is broadcast multiple times.

Read the following Snap! scripts:

broadcast 'test' three times broadcast and wait 'test' three times receive 'test' and add item to list

What do you think the list some list will look like if we press b? What about if we press w? Discuss with your neighbor. When you're ready, move on to the next page.