code 練習繪製圖形

lightbot 

https://lightbot.com/flash.html

New Program

Edit Title

https://www.khanacademy.org/computer-programming/new/pjs 

OR SHARE YOUR CLASS CODE

Or, students can join your class with a class code.
They need to:

1. Sign up at khanacademy.org (or log in with their existing accounts)
2. Visit khanacademy.org/coaches
3. There, in the "Add a coach" field, enter the class code 5VJYH7

blocky  練習區
https://blockly-demo.appspot.com/static/demos/index.html 
https://developers.google.com/blockly/