GMOD > '<eof>' expected near 'elseif' Lua Help?

[itzkaneki]

Just to start of I am extremely new to coding in lua! Please don't hate me <3 .

Anyways, I am getting the error:

[ERROR] lua/weapons/brickv2.lua:10: '<eof>' expected near 'elseif'

In this code:

if SERVER then
-- Serverside Code --
AddCSLuaFile ("shared.lua")

SWEP.Weight = 5

SWEP.AutoSwitchTo = false
SWEP.AutoSwitchFrom = false
end
elseif CLIENT then
-- Clientside Code --
SWEP.PrintName = "Brick V2"

SWEP.Slot = 4
SWEP.SlotPos = 1

SWEP.DrawAmmo = false

SWEP.DrawCrosshair = false

undo.Create("Brick_V2_Entity")
language.Add("Undone_Brick_V2_Entity","Undone Thrown Brick")
end

SWEP.Author = "ItzKaneki"
SWEP.Contact = "steamcommunity.com/id/itzkaneki69"
SWEP.Purpose = "Smack 'em with a brick!"
SWEP.Instructions = "Just smack 'em!"

SWEP.Category = "Other"
SWEP.Spawnable = true
SWEP.AdminSpawnable = true

SWEP.ViewModel = "models/props_junk/CinderBlock01a.mdl"
SWEP.WorldModel = "models/weapons/c_brick.mdl"

local ShootSound = Sound("Weapon_Crowbar.Melee_Hit")

function SWEP:Reload()
end

function SWEP:Think()
end

function SWEP:throw_attack (model_file)
if (!SERVER) then return end
local ent = ents.Create("prop_physics")
ent:SetModel(models/props_junk/CinderBlock01a.mdl)

ent:SetPos(self.Owner:EyePos() + (self.Owner:GetAimVector() * 16))
ent:SetAngles(self.Owner:EyeAngles())
ent:Spawn()

local phys = ent:GetPhysicsObject()

if !(phys && IsValid(phys)) then ent:Remove() return end
phys:ApplyForceCenter(self.Owner:GetAimVector():GetNormalized() * math.pow(tr.HitPos:Length(), 3))

cleanup.Add(self.Owner, "props", ent)

undo.Create ("Thrown_SWEP_Entity")
undo.AddEntity (ent)
undo.SetPlayer (self.Owner)
undo.Finish()
end

function SWEP:PrimaryAttack()

Self:throw_attack("models/props_junk/CinderBlock01a.mdl")
end
function SWEP:SecondaryAttack()
end

I did some research and found that <eof> means end of function but I don't understand what I need to do to fix it.
It is probably really easy but as I said I'm new (my excuse :P)

Any help please?

[highlight](User was banned for this post ("Missed forum description - see Developer Discussion for help!" - NiandraLades))[/highlight]

[c👌de_g🎷]

Take the end out after if SERVER then.

[itzkaneki]

After I do that I got this error:

[ERROR] lua/weapons/brickv2.lua:21: attempt to call field 'Create' (a nil value)

Any help with this one?

--EDIT--

I fixed this, I had it so it would try to create an undo when it wasn't needed or whatever. I saw undo code down further and figured out I'm dumb