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Clicker Game
==============

Description
-------------

Today we will play a game of poking balloons.

Click the green flag to start.

.. raw:: html

    <iframe src="https://scratch.mit.edu/projects/526927491/embed" allowtransparency="true" width="695" height="576" frameborder="0" scrolling="no" allowfullscreen></iframe>

Or click `Clicker Game <https://scratch.mit.edu/projects/526927491/editor/>`_, and then learn online tutorial on the Scratch official website.

Required Components
-------------------------------

- A Screen
- Scratch 3 (either online or offline)

You Will Learn
---------------------

- Pick random number.
- Change the position, size and color of the sprite.
- Make a variable.

Lesson Guide
--------------

Let the balloons appear randomly.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

First, add Balloon1 sprite and Colorful City backdrop.

.. image:: img/clicker_game1.png
  :align: center

Set the balloon to a random position.

.. image:: img/clicker_game2.png
  :width: 500
  :align: center

Let it change the color and size randomly.

.. image:: img/clicker_game3.png
  :width: 700
  :align: center

Now, run the green flag and you can see the balloons randomly change in the stage area.

Click on the balloon to add score.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Now, we need to establish a scoring mechanism. Whenever the balloon is clicked, the score will increase by one.

Create a variable (it can help us keep track of and store the score). In Variables, select 「**Make a Variable**」 and named **score**.

.. image:: img/clicker_game4.png
  :align: center

We will see it in the upper left corner of the stage.

.. image:: img/clicker_game5.png
  :align: center

When the balloon is clicked, the score is increased by one. When you click the green flag (the game starts), the score will be reset to zero.

.. image:: img/clicker_game6.png
  :width: 700
  :align: center

Now, click the green flag above the stage area to start the game, and click the balloon to increase your score!

Challenge
-----------

I believe that you will be smart enough to program and implement this game soon. Next, we will add some challenges to enrich our game content.

- When the balloon is clicked, the sound effect of "POP" is emitted.
- Let the Pufferfish sprite appear randomly on the stage as well, if you click on it, you will lose score!