DEMO 1: An event is a block of code that has a specific task and must receive a signal to run.

We use an event handler to tell the program what signal to listen for to run an event.

• Click Run to see a the parts of an event.
• Click the Continue on the stage to see what each line does.
• Click Submit and Next to answer the questions about functions.

To navigate the page using the TAB key, first press ESC to exit the code editor.