Change things only for one Player

[Dr. Boom]

Seas =)

I want make something like (ok it's somehow dotastyle - but I don't want make it because dota has it)

How can I change the weather for triggering Player?
- How check I the weather type it a player types: -weather rain / -weather sunlight / -weather moonlight.
- How to change it only for the triggering Player?
- If a Player has chosen rain - and want now moonlight - rain needs to disappear and moonlight is coming (omg sry for this nooby english ...)

How can I change the water, if a player types: -water blue / -water red / or -water green?

Ofc - I think for 90% hiveusers will this done in 10 seconds - but I need some help plz =)

 

[reason 3]

Maybe change the "let's say water doodad" color?You can create 3 different variations of it,and change for triggering player(who types -water red for example).