How could I use a script to create a mesh?

I want to use a mesh in a script but you can't put an ID for meshparts in scripts, how would I put a mesh in a script like you would with with a part? For example if you wanted to insert a part you would just do Instance.new but how would I do something similar with a mesh?

I tried putting the meshes in serverstorage then cloning them but that didn't work properly, the script works fine if you are alone but if 2 players activate it then the meshes teleport to the player that activated it last, this is the script:

local ReplicatedStorage = game:GetService("ReplicatedStorage")




local Table = {}
ReplicatedStorage.RemoteEvent3.OnServerEvent:Connect(function(player)
local ServerStorage = game.ServerStorage        
local function ShockWave()
    wait(0.6)
    game.ServerStorage.ShockWaveMesh:Clone().Parent = game.Workspace
    local ShockWave = game.Workspace.ShockWaveMesh
    ShockWave.Position = player.Character.RightHand.Position
    ShockWave.Orientation = player.Character.HumanoidRootPart.Orientation
    ShockWave.Size = Vector3.new(1,1,0.5)
    ShockWave.Transparency = 0.5
    ShockWave.CanCollide = false
    game.ServerStorage.ShockWaveMesh2:Clone().Parent = game.Workspace
    local BodyVelocity = Instance.new("BodyVelocity")
    local ShockWave2 = game.Workspace.ShockWaveMesh2
    BodyVelocity.Parent = ShockWave2
    ShockWave2.Orientation = ShockWave.Orientation
    ShockWave2.Position = ShockWave.Position
    ShockWave2.Size = Vector3.new(5,5,5)
    ShockWave2.Transparency = 0.5
    ShockWave2.CanCollide = false
    BodyVelocity.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
    BodyVelocity.Velocity = ShockWave.CFrame.lookVector * 40
    ShockWave2.Touched:Connect(function(hit)
        local humanoid = hit.Parent:FindFirstChild("Humanoid")
        if humanoid and hit.Parent.Name ~= player.Name then
            local found = false
            for i = 1,#Table do
                if Table[i] == hit.Parent.Name then
                found = true
            end
            end
        if found == false then
            table.insert(Table,game.Players:GetPlayerFromCharacter(hit.Parent).Name)
            humanoid:TakeDamage(30)
            found = true
            wait(3)
            for i = 1,#Table do
                if Table[i] == hit.Parent.Name then
                    table.remove(Table,i)

                end
            end
        end
    end
end)


    spawn(function()
    for i = 1,100 do    
        wait()
        ShockWave.Size = ShockWave.Size + Vector3.new(1,1,0.01)
        ShockWave.Transparency = ShockWave.Transparency + 0.005
        ShockWave2.Size = ShockWave2.Size + Vector3.new(1,1,1)
        ShockWave2.Transparency = ShockWave2.Transparency + 0.005
        if ShockWave.Transparency == 1 or i == 100 or ShockWave2.Transparency == 1 then
            ShockWave:Destroy()
            ShockWave2:Destroy()

        end
    end
end)
    spawn(function()
for i = 1,100 do
wait()
ShockWave2.Orientation = ShockWave2.Orientation + Vector3.new(0,0,3)
ShockWave2.Position = ShockWave2.Position + Vector3.new(0,0.1,0)
end
end)    




end


ShockWave()
end)