How do I make a block that puts dialog on your screen?"

I have it working

local gui = game.StarterGui.ScreenGu i--this will be the gui
local brick = partNameHere --the part you touch

brick.Touched:Connect(function(hit) --when the player touches it
    if hit.Parent:FindFirstChild("Humanoid")  then --making sure it’s a player
brick:Destroy() --destroying the brick to prevent glitches. Optional you can delete this line
gui.Enabled = true --enabling it
wait(4) —letting other stay on screen (change the number for different times it goes in seconds)
gui.Enabled = false --disabling it
end

--USE A LOCAL SCRIPT-- put the script in the screen gui put the screen gui in startergui change partNameHere to the name of the part put a frame in the gui put a text label in the frame you have to disable the gui in properties you have to edit text label text in properties leave frame and text label visible always