Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Equip only to a Level 3 or lower WATER monster. If it destroys an opponent's monster by battle, send 1 random card in your opponent's hand to the Graveyard.
--ハイドロプレッシャーカノン
--Hydro Pressure Cannon
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c,nil,s.filter)
	--handes
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCategory(CATEGORY_TOGRAVE)
	e3:SetCode(EVENT_BATTLE_DESTROYING)
	e3:SetCondition(s.hdcon)
	e3:SetTarget(s.hdtg)
	e3:SetOperation(s.hdop)
	c:RegisterEffect(e3)
end
function s.filter(c)
	return c:IsLevelBelow(3) and c:IsAttribute(ATTRIBUTE_WATER)
end
function s.hdcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:GetFirst()==e:GetHandler():GetEquipTarget() and eg:GetFirst():IsStatus(STATUS_OPPO_BATTLE)
end
function s.hdtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,1-tp,LOCATION_HAND)
end
function s.hdop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local g=Duel.GetFieldGroup(tp,0,LOCATION_HAND)
	if #g==0 then return end
	local sg=g:RandomSelect(tp,1)
	Duel.SendtoGrave(sg,REASON_EFFECT)
end