random_get_seed();
Returns: Real
To generate a random number GameMaker: Studio starts with
a random seed number. With this function you can retrieve
that seed, which can then be stored to reproduce a specific series
of random events. For example, say you have a procedurally
generated game, but want the player to be able to go back to
previously discovered areas. Well, at the start of each area, you
can store the random seed with this function and so every time you
need to go back there, you can use random_set_seed to set the seed
to what it was previously and so force GameMaker: Studio to
reproduce the same set of "random" functions that it used
previously.
ini_open("Save.ini")
ini_write_real("Levels", string(level), random_get_seed());
ini_close();
The above code will get the random seed and store it in an ini file.