Script description languages (scripting languages) are high-level programming languages that are interpreted by some program during its execution. Script languages provide quite attractive features, has more complex tools and supports more advanced programming techniques, in comparison to compiled languages. Scripting languages allow a simple and compact way to describe the control flow of a large number of objects in the subject area. However, many languages are based on some template approaches that can create problems during use and cause a lot of errors. The article presents a specialized language developed by the authors for describing scenarios of asynchronous event-driven systems. The Link language solved such well-known problems of programming languages as the use of null, close correlation of data with the code, great difficulty in developing and reading code, global scope of variables. Some of its features, such as links, the separation of functions into types, operation of application functions, function classes, partial tuning and inheritance of functions offer an approach different from most languages in the development of scenarios of runnable event-driven systems.