How would I make my custom player list move when a player leaves the game?

I want to make it so that when a player leaves the game my custom player list will update and make a new list updating all the button positions to the top most available button slot. This is my script:

local Frame=script.Parent
local Button=Frame.Button
local Players=game:GetService("Players")
local function Add(Player)
local ButtonNumber=Frame.Buttons:GetChildren()
local ButtonC=Button:Clone()
ButtonC.Name=Player.Name
ButtonC.Text=Player.Name
ButtonC.Parent=Frame.Buttons
local Y=0.05*(#ButtonNumber)
ButtonC.Position=UDim2.new(0,10,Y,0)
end
local function Update()
for I,V in pairs(Players:GetPlayers())do
Add(V)
end
Players.PlayerAdded:Connect(function(Player)
Add(Player)
end)
Players.PlayerRemoving:Connect(function(Player)
Frame.Buttons[Player.Name]:Destroy()
end)

There is a folder called buttons and a default button that gets cloned into the folder inside the frame.