LocalScript, Parent playerList(ScreenGui):

--< variables

local players = game:GetService("Players")
local frame = script.Parent.Frame
local slots = frame.slots
local temp = frame.Template

local players_table = {}

--< tween info:TweenPosition(endPosition, EasingDirection, EasingStyle, Time, Override)

local dir = "Out"
local style = "Quad"
local dur = 0.5

--< functions

local function cleanup(slot)

    -- repeat wait until the slot finishes tweening
    repeat
	    wait()
    until slot.Position.X.Offset == 400
    slot:Destroy()

end

local function remove(leaving)
	
	-- check if a player is leaving
	if leaving then
	
	    -- if so, delete dictionary entry
	    players_table[leaving] = nil
	    -- tween players slot out
	    local slot = slots:FindFirstChild(leaving)
		slot:TweenPosition(UDim2.new(0, 400, 0, slot.Position.Y.Off), dir, style, dur, true)
	
	    -- delete the slot once it finishes (coroutine)
		local cor = coroutine.wrap(cleanup)
		cor(slot)
	
    end	
end

local function add()
	
	-- loop through players
	local chil = players:GetChildren()
	for c = 1, #chil do
	
	    -- check if present in dictionary
	    if players_table[chil[c].Name] == nil then
	
	        -- add to dictionary
	        players_table[chil[c].Name] = 1
	
	        -- create a slot in the list
	        local slot = temp:Clone()
	
	            -- edit this slot
	            slot.Name = chil[c].Name
	            slot.Text = slot.Name
	            slot.Parent = slots
	    end
	end
end

local function adjust(leaving)
	
	-- add() and remove()
	add()
	remove(leaving)
	
	local count = 0	
	-- loop through players_table
	for key, value in pairs(players_table) do
	count = count + 1
		-- find corresponding slots
		local slot = slots:FindFirstChild(key)
		
		-- tween slot positions
		local ypos = 30 + (25+2)*(count-1)
		slot:TweenPosition(UDim2.new(0, 0, 0, ypos), dir, style, dur, true)
	    
	end		
end

--< events

-- player added event
players.PlayerAdded:connect(function()
	adjust()
end)

-- player removing event
players.PlayerRemoving:connect(function(leaving)
	adjust(leaving.Name)
end) 

--< setup

adjust()

playerList's children: LocalScript and Frame. Frame's children: slots(Folder), Template(TextLabel), TextLabel any fixes? If so, answer me with the answer tool, not the comments, if not don't answer. :)

-Skepticalitys

The video tutorial I got the LocalScript in:

Click for video

This LocalScript uses Tweening if that helps.

Anonymous