Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, during your End Phase: You can change the battle position of this card.
--リトル・ウィンガード
--Little-Winguard
local s,id=GetID()
function s.initial_effect(c)
	--pos change
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_PHASE+PHASE_END)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.poscon)
	e1:SetTarget(s.postg)
	e1:SetOperation(s.posop)
	c:RegisterEffect(e1)
end
function s.poscon(e,tp,eg,ep,ev,re,r,rp)
	return tp==Duel.GetTurnPlayer()
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_POSITION,e:GetHandler(),1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.ChangePosition(c,POS_FACEUP_DEFENSE,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK)
	end
end