Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
FLIP: Special Summon 1 "Ivy Token" (Plant-Type/EARTH/Level 1/ATK 0/DEF 0) in Defense Position to your opponent's side of the field. When this Token is destroyed, its controller takes 300 damage.
--アイヴィ・ウォール
--Wall of Ivy
local s,id=GetID()
function s.initial_effect(c)
	--token
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_TOKEN)
	e1:SetType(EFFECT_TYPE_FLIP+EFFECT_TYPE_SINGLE)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.listed_names={30069399}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_TOKEN,nil,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(1-tp,LOCATION_MZONE)<=0 
		or not Duel.IsPlayerCanSpecialSummonMonster(tp,id+1,0,TYPES_TOKEN,0,0,1,RACE_PLANT,ATTRIBUTE_EARTH,POS_FACEUP_DEFENSE,1-tp) then return end
	local token=Duel.CreateToken(tp,id+1)
	if Duel.SpecialSummonStep(token,0,tp,1-tp,false,false,POS_FACEUP_DEFENSE) then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EVENT_LEAVE_FIELD)
		e1:SetOperation(s.damop)
		token:RegisterEffect(e1,true)
	end
	Duel.SpecialSummonComplete()
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsReason(REASON_DESTROY) then
		Duel.Damage(c:GetPreviousControler(),300,REASON_EFFECT)
	end
	e:Reset()
end