Although several tools are available to ease the implementation of programming languages (e.g., SmaCC), creating a complete programming environment remains a difficult task.Perseusis a framework for programming environment. Effort to implement programme editor and debugging tool is considerably easier compared to a "from-scratch" approach.Load the SmallScript project. It is a simple javascript-like language. Try in a workspace:PSWorkspace openFor: SScriptInterpreterEnter the following example as a program:function f(x) { if (x > 0) { return x * f(x - 1); } else { return 1; }; } f(3);Once entered, accept the code (right click or alt-s), then press run. You can also set breakpoints.For more information, please contact the authors - Alexandre Bergel and Jan Vrany