Create README.md
change
Revert "change"

This reverts commit 22abc00e6980b8165f6684ad625243e2b3d77528.
viuslizing the PlayingScene
modify the PlayingScene class
Merge pull request #1 from joeyzhang1989/developing

Developing
Merge pull request #16 from joeyzhang1989/master

version 0.2 task-visualize the PlayingScene class