Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During damage calculation, in either player's turn: You can discard this card; you take no Battle Damage from that battle. When this card is Summoned: Toss a coin and apply this effect. The effect lasts while this card is face-up on the field. ● Heads: Halve all Battle Damage you take. ● Tails: Halve all Battle Damage your opponent takes.
--アルカナフォースⅩⅣ－TEMPERANCE
--Arcana Force XIV - Temperance
local s,id=GetID()
function s.initial_effect(c)
	--Discard to prevent battle damage
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,1))
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetRange(LOCATION_HAND)
	e1:SetCode(EVENT_PRE_DAMAGE_CALCULATE)
	e1:SetCondition(s.damcon)
	e1:SetCost(Cost.SelfDiscard)
	e1:SetOperation(s.damop)
	c:RegisterEffect(e1)
	--Toss a coin and apply the appropriate effect
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_COIN)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_SUMMON_SUCCESS)
	e2:SetTarget(s.cointg)
	e2:SetOperation(s.coinop)
	c:RegisterEffect(e2)
	local e3=e2:Clone()
	e3:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e3)
	local e4=e2:Clone()
	e4:SetCode(EVENT_FLIP_SUMMON_SUCCESS)
	c:RegisterEffect(e4)
end
s.toss_coin=true
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetBattleDamage(tp)>0
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	--Prevent Battle Damage
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_AVOID_BATTLE_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(1,0)
	e1:SetReset(RESET_PHASE|PHASE_DAMAGE_CAL)
	Duel.RegisterEffect(e1,tp)
end
function s.cointg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_COIN,nil,0,tp,1)
end
function s.coinop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) or c:IsFacedown() then return end
	s.arcanareg(c,Arcana.TossCoin(c,tp))
end
function s.arcanareg(c,coin)
	--Heads: Halve all Battle Damage you take
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTargetRange(1,0)
	e1:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
	e1:SetCondition(s.rdcon1)
	e1:SetValue(HALF_DAMAGE)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	c:RegisterEffect(e1)
	--Tails: Halve all Battle Damage your opponent take
	local e2=e1:Clone()
	e2:SetTargetRange(0,1)
	e2:SetCondition(s.rdcon2)
	c:RegisterEffect(e2)
	Arcana.RegisterCoinResult(c,coin)
end
function s.rdcon1(e,tp,eg,ep,ev,re,r,rp)
	return Arcana.GetCoinResult(e:GetHandler())==COIN_HEADS
end
function s.rdcon2(e,tp,eg,ep,ev,re,r,rp)
	return Arcana.GetCoinResult(e:GetHandler())==COIN_TAILS
end