Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can send this card from your hand to the Graveyard to reduce the Level of 1 monster on the field by 1, until the End Phase.
--寂々虫
--Silent Strider
local s,id=GetID()
function s.initial_effect(c)
	--lvup
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCost(Cost.SelfToGrave)
	e1:SetTarget(s.lvtg)
	e1:SetOperation(s.lvop)
	c:RegisterEffect(e1)
end
function s.lvfilter(c)
	return c:IsFaceup() and not c:IsType(TYPE_XYZ)
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and s.lvfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.lvfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,s.lvfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_LEVEL)
		e1:SetValue(-1)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
	end
end