Basic NPC Chat

local NPC = workspace.NPC
local TA = NPC.TextActivator
local player = game:GetService("Players").LocalPlayer
local hum = player.Character:WaitForChild("Humanoid")
local npcText = script.Parent.NPCTextFrame.NPCText
local NPCTF = script.Parent.NPCTextFrame

local active = false

TA.Triggered:Connect(function()
    if active == false then
        NPCTF.Visible = true
        hum.WalkSpeed = 0
        local function typewrite(object, text, length)
            for i = 1, #text, 1 do
                object.Text = string.sub(text,1,i)
                wait(length)
            end
        end
        wait(1)
        typewrite(npcText, "Have you notice why I'm here?", .01)
        wait(2)
        typewrite(npcText, "Because creator put me here and he know you gonna look at me.", .01)
        wait(3)
        typewrite(npcText, "...", .03)
        wait(4)
        typewrite(npcText, "I'm just NPC you know.", .01)
        wait(5)
        npcText.Text = " "
        NPCTF.Visible = false
        hum.WalkSpeed = 16
        active = false
    end
end)