I loved Nigui, it is small and easy, issue with e.g.10
i tried some examples. key feature i liked  nigui because
1.  very fast compile time
2.  small executable
3.  easy to learn
please make it complete. the issue is example 10 compile perfectly but in execution time it raise an error. windows 7
![Capture](https://user-images.githubusercontent.com/26684644/63991798-b56ebe00-cb1b-11e9-8439-52a632734bb7.PNG)

