Help explain clearly how to run the script to compile raylib for PLATFORM_WEB

Working-for-Web-(HTML5).md

@@ -31,7 +31,7 @@ Before compiling your game, raylib library **must be recompiled for HTML5**, gen
 
 Before compiling raylib, make sure all paths to emscripten (`EMSDK_PATH`) and tools are correctly configured on `C:/raylib/raylib/src/Makefile`, you must verify [these lines](https://github.com/raysan5/raylib/blob/master/src/Makefile#L149).
 
-To compile raylib source code, just execute Notepad++ script: `raylib_makefile` and `SET PLATFORM=PLATFORM_WEB`. That script just calls the following `make` line (in case you're are working on a custom environment):
+To compile raylib source code, just execute Notepad++ script: `raylib_makefile` and `SET PLATFORM=PLATFORM_WEB`. To do this, start up Notepad++ for raylib, open the `raylib.h` file, press F6, choose `raylib_makefile`, verify that in the script `SET PLATFORM=PLATFORM_WEB`, then click OK to run the script. That script just calls the following `make` line (in case you're are working on a custom environment):
 
 `make PLATFORM=PLATFORM_WEB -B`