Arduino "reqeuest new script" over wifi

Interesting concept, but this is an Arduino (though if it is interacting with the Internet, it is far more likely to be an ESP), not a PC, so why would there be a need to "update" the code?

The ESPs facilitate OTA code update, but generally on a "push" rather than a "pull" basis.

Enhancement by remote access is much easier using an interpretive system such as FORTH or Lua.