[programming questions] [scratch Level 2] March 2019 garbage classification

refuse classification

Garbage classification has become a very important part of our daily life , This is for environmental protection 、 Resource recycling is of great significance .

Now let's play a simple interactive garbage sorting game .

1. preparation

（1） Import... In the background library “Mural”, And edit the background , Add two trash cans as shown in the figure below , Indicate the “ Recyclable waste ” and “ Non recyclable garbage ” The text of ;

（2） Import... From the role library “Takeout” As a kind of paper bag garbage .

2. Function realization

（1） Click the green flag , Garbage on the ground “Takeout”（ modelling a）, The location of garbage does not contact the garbage can , Garbage static 1 second .

（2） Garbage moves towards the mouse pointer .

（3） When the garbage meets the green recyclable garbage can, it disappears , And said “ Correct classification ”2 second ： When the garbage meets the blue non recyclable garbage can, it will not disappear , And said “ Classification error ”2 second .

3. Design ideas and implementation

（1） Role analysis

• role ：Takeout

（2） Background analysis

• background ：Mural（ Draw two trash cans on it ）

（3） Introduction to the building blocks used

a. Sports