"make a script where only a player with the username ijustgothitby_acar can see a gui at the top of the screen when he clicks it it will show this image id on the screen 12412007525 for 3 seconds andfor 3 seconds it will also play this sound 4283208648 make it so the jumpscare fills up the whole screen"

-- This mode only specializes in Module scripts, we recommend using another appropriate mode for getting better responses for this query 
-- local script (StarterGUI) 
local player = game.Players.LocalPlayer
local allowedUsername = "ijustgothitby_acar"

if player.Name == allowedUsername then
    local screenGui = Instance.new("ScreenGui", player.PlayerGui)

local button = Instance.new("TextButton", screenGui)
    button.Text = "Click me"
    button.Size = UDim2.new(0, 100, 0, 50)
    button.Position = UDim2.new(0.5, -50, 0, 0)

local function showJumpscare()
        local jumpscareImage = Instance.new("ImageLabel", screenGui)
        jumpscareImage.Image = "rbxassetid://12412007525"
        jumpscareImage.Size = UDim2.new(1, 0, 1, 0)
        jumpscareImage.BackgroundTransparency = 1

local jumpscareSound = Instance.new("Sound", screenGui)
        jumpscareSound.SoundId = "rbxassetid://4283208648"
        jumpscareSound:Play()

wait(3)

jumpscareImage:Destroy()
        jumpscareSound:Destroy()
    end

button.MouseButton1Click:Connect(showJumpscare)
end