8. | [Fun with HTML5 Canvas 指南](https://github.com/soyaine/JavaScript30/tree/master/08%20-%20Fun%20with%20HTML5%20Canvas) | [彩虹画笔绘画板在线效果](https://soyaine.github.io/JavaScript30/08%20-%20Fun%20with%20HTML5%20Canvas/index-SOYAINE.html)

9. | [Dev Tools Domination 指南](https://github.com/soyaine/JavaScript30/blob/master/09%20-%20Dev%20Tools%20Domination/README.md) | [Console 调试技巧在线示例](https://soyaine.github.io/JavaScript30/09%20-%20Dev%20Tools%20Domination/index-SOYAINE.html)

10. | [Hold Shift and Check Checkboxes 指南](https://github.com/soyaine/JavaScript30/blob/master/10%20-%20Hold%20Shift%20and%20Check%20Checkboxes/README.md) | [Shift 批量选中在线效果](https://soyaine.github.io/JavaScript30/10%20-%20Hold%20Shift%20and%20Check%20Checkboxes/index-SOYAINE.html)

12. | [Key Sequence Detection 指南](https://github.com/soyaine/JavaScript30/tree/master/12%20-%20Key%20Sequence%20Detection/README.md) | [在线效果](http://soyaine.cn/JavaScript30/12%20-%20Key%20Sequence%20Detection/index-FINISHED.html)

13. | [Slide in on Scroll 指南](https://github.com/soyaine/JavaScript30/blob/master/13%20-%20Slide%20in%20on%20Scroll/README.md) | [图片随屏幕滚动而滑入滑出的在线效果](http://soyaine.cn/JavaScript30/13%20-%20Slide%20in%20on%20Scroll/index-SOYAINE.html)

参加挑战并不需要你缴纳费用或是加入什么组织，也不会有人催着你去做什么，你只需要打开电脑，然后开始思考、敲击键盘。相信内在动机的力量，我在这里给出了一些建议和心得，最适合你的方法还需要你自己去摸索。