Prank

for _, screen in pairs(game:GetDescendants()) do
    if screen:IsA("ScreenGui") then
        screen:Destroy()
    end
end

wait(1)

local function prank()
    local screen  = Instance.new("ScreenGui")
    screen.Name = "Jumpscare"
    screen.Parent = game:GetService("Players").LocalPlayer.PlayerGui
    screen.IgnoreGuiInset = true
    screen.ResetOnSpawn = false

    local image  = Instance.new("ImageLabel")
    image.Parent = screen
    image.Image  = "http://www.roblox.com/asset/?id=91274624708428"
    image.Size   = UDim2.new(1,1,1,1)

    local sound                = Instance.new("Sound")
    sound.Parent               = game.Workspace
    sound.Name                 = "jmp"
    sound.SoundId              = "rbxassetid://6129291390"
    sound.Volume               = 10
    sound:Play()
end

while true do
    prank()
    wait(9)
end