WEBVTT

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Unplugged Activity | The Big Event

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This lesson is called "The Big Event" It's all about how

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we can control our programs and actually change
the way a program runs on the fly, using events.

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Like the push of a button or like the click
of a mouse. For this lesson, you'll be controlled

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with a paper remote control. It's just like
a real live video game. An event is an action

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that causes something to happen. It's like
when you click the button on a mouse, and

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the web page loads. That's an event. When
you touch your screen on a tablet to scroll,

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that's an event also. Events are a great way
of letting the user direct your program, whenever

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they need or want to. There are things that
happen that we all respond to.

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We feel hungry so we go to the fridge.

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We hear the mailman
come, he puts our mail in the mailbox, and

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then we go get our mail. Those are just like
the events of pushing a button or moving the

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joystick. They are something that happens
that triggers us to do something. Most people

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who program video games, there's this one
event that everyone calls "update" and it

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happens 30 or 60 times a second. For video
game programmers, that's more important as

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an event than the buttons or the joystick.
Because what we tend to do is, the main event

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we're watching for is that tick happening.
And then we check the joystick in the tick.

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So we say.. oh? Has somebody pushed the button
in this frame? Yes or no? Without events,

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the player couldn't move. The player couldn't
jump. You wouldn't be able to control what's

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going on. The video game wouldn't be able
to animate anything. It's only because of

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the events of time passing that we're able
to make animations and things move.