这是一个flash源文件，效果很好，测试平台为flash 8.0（如果提示问题请选择合适的版本试试），代码的效果是：背景中的动态-This is a flash source file, the effect is very good, the test platform for flash 8.0 (if tip problem please choose the right version try), the effect of the code is the dynamic backgro