H tml5 (6) rain effect

After studying HTML5, I came up with some ideas and thought that the game is actually in four steps.

1. Create an object you need and assign attributes (attributes that affect methods) and methods (motion, called ....)

2. instantiate this object to make it one or more individuals

3. Draw the shape of the object you need to draw.

4. Call the drawing method to pass in the instantiated object. The shape of an object after instantiation is displayed. The rest is to think about how to properly display this shape,

The basic idea of the game is achieved,

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