[Bro] BRO signature

[Anshu Sharma]

Sir/Mam
i read the document which is provided in bro.org website regarding
signature framework.
But the thing which i cant understand is that where i have to place this
file i.e i write a simple program with name hello.bro but i don't know in
which folder this file to place because in command prompt it always says
cannot create a file.
Please tell me what can i do and also some information about how to write a
signature code .
thank you
wishing your early reply
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