Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
FLIP: You can equip this card to a monster your opponent controls as an Equip Card. Inflict 400 damage to the controller of the equipped monster during each Standby Phase.
--ワーム・ミリディス
--Worm Millidith
local s,id=GetID()
function s.initial_effect(c)
	--flip
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_FLIP+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DELAY)
	e1:SetTarget(s.eqtg)
	e1:SetOperation(s.eqop)
	c:RegisterEffect(e1)
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and chkc:IsFaceup() end
	if chk==0 then return e:GetHandler():IsRelateToEffect(e) and e:GetHandler():IsFaceup()
		and Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and not e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local g=Duel.SelectTarget(tp,Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,e:GetHandler(),1,0,0)
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if not tc or c:IsFacedown() or not c:IsRelateToEffect(e) then return end
	if tc:IsFacedown() or not tc:IsRelateToEffect(e) then
		Duel.SendtoGrave(c,REASON_EFFECT)
		return
	end
	if not Duel.Equip(tp,c,tc,false) then return end
	--damage
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_SZONE)
	e1:SetTarget(s.damtg)
	e1:SetOperation(s.damop)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	c:RegisterEffect(e1)
	--eqlimit
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_EQUIP_LIMIT)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetValue(s.eqlimit)
	e2:SetLabelObject(tc)
	e2:SetReset(RESET_EVENT|RESETS_STANDARD)
	c:RegisterEffect(e2)
end
function s.eqlimit(e,c)
	return c==e:GetLabelObject()
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,e:GetHandler():GetEquipTarget():GetControler(),400)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local tg=e:GetHandler():GetEquipTarget()
	if tg then
		Duel.Damage(tg:GetControler(),400,REASON_EFFECT)
	end
end