not local
local function click(player)
game.Workspace.Countdown.BrickColor = BrickColor.new("New Yeller")
player.Character.Head.Anchored = true
wait(10)
game.Workspace.Countdown.BrickColor = BrickColor.new("Lime green")
player.Character.Head.Anchored = false
while true do
script.Player.PlayerGui.Tasksbar.t2.BackgroundColor3 = Color3.new("Lime Green")
end
end
workspace.Task1.ClickDetector.mouseClick:connect(click)

2 comments
is the script returning any errors? you should make the "while true do" statement "while wait() do"
i said the error, it doesnt work