Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When attacked by your opponent's monster, select another 1 of your Monster Cards and designate it as the attack's target, then calculate damage.
--幻影の妖精
--Dreamsprite
local s,id=GetID()
function s.initial_effect(c)
	--change attack target
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_BATTLE_CONFIRM)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetAttackTarget()==e:GetHandler() and Duel.GetAttacker():IsControler(1-tp)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and chkc~=e:GetHandler() end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,nil,tp,LOCATION_MZONE,0,1,1,e:GetHandler())
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	local a=Duel.GetAttacker()
	if tc and tc:IsRelateToEffect(e) and a:CanAttack() and not a:IsImmuneToEffect(e) then
		Duel.CalculateDamage(a,tc)
	end
end