Rain Script :-Help

[neomaximus2k]

ok not very often i ask for help but this one has got me stumped.
if the player has the following script as a weapon it will work fine, however i dont want the player to have it as a weapon, instead it needs to be an NPC on the level that everyone can see the rain on that level, any help will be much apreciated thanks

NPC Code:

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<removed>

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i post all the script cause i not sure what is wrong