WEBVTT

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Hi everyone,

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One of the most exiting things of a program 
is that it can be interactive.

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Any time someone clicks, tabs or types something at a computer or phone, that generates a event.

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and there is some code that decides what to do when an event occurs.

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For example, you could have an eventhandler that sais

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"when the mouse is clicked, play a sound".

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Let's try an activity to see how it works.

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Have you ever heard of the game Flappy Bird?

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By using eventhandlers, you can learn how to program 
your very own custom version of Flappy Bird.

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The code you write involves dragging and dropping blocks, 
that represents commands for the computer.

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Drag and drop programming is the easiest way to learn...

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It's even how university students learn how to code.

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But under the hood, each block is represented by real code.

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If you take a look at the workspace, there are some green blocks that are filled in for you.

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These are event handlers.

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If you want the bird to flap, when you click your mouse, you can do this by attaching the flap-block to the appropriate eventhandler.

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And now in your game, whenever you click your mouse, the bird will flap.

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In each puzzle of this activity, we will introduce new types of events as green blocks on the work space.

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and you can decide the appropriate block to add in responds of these events.

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When you see a arrow like this, you can change the settings,

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like the sound to play when the bird touches the ground.

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In the final puzzle, you will be able to create your own game and share it with your friends.

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Have fun!