Test

local Players = game:GetService("Players")

function onPlayerAdded(player)

local gui = Instance.new("ScreenGui",player.PlayerGui)
local frame = Instance.new("Frame", gui)
frame.Size = UDim2.new(1,0,1,0)
frame.BackgroundColor3 = Color3.new(255, 229, 135)
for i = 0, 4.5, 0.05 do
print(i)
local imagegui = Instance.new("ImageLabel",frame)
imagegui.Size = UDim2.new(1,0,1,0)
imagegui.BackgroundTransparency = 1
imagegui.Image = "http://www.roblox.com/asset/?id="
wait()
end
end

--When a player joins, call the onPlayerAdded function
Players.PlayerAdded:connect(onPlayerAdded)

--Call onPlayerAdded for each player already in the game
for _,player in pairs(Players:GetPlayers()) do
    onPlayerAdded(player)
end