How would i make this a keydown script? So that when i press a key it activates.

wait(.1)
--[[
    A note from script:
    If you decide to take this script, make sure you take the module as well. It's in workspace.
    This won't work unless this script is a LocalScript in StarterGui/StarterPack and the modulescript is in workspace.
    I hope you enjoy the script and the modulescript attached to it. In the video I have showed you how to add your 
    own effects and such. All you need is the chatted event and then the module functions
    To add aura and hat use SSJAura() and SSJHat()
    Thanks for using my script
    --script_ing
--]]
local mod = require(workspace.SSJModule)
local TransformationAnims = mod.TransformationAnims
local ScreenAnims = mod.ScreenAnims
local p = game.Players.LocalPlayer
--[[
    Module functions:
    TransformationAnims.SphereExplosion()
    TransformationAnims.CylinderExplosion()
    TransformationAnims.RingExplosion()
    ScreenAnims.FlashScreen()
    mod:ChatFunction(msg) --the msg argument IS ALWAYS A STRING
--]]
function SSJAura()
    local tor = p.Character.Humanoid.RigType == "R6" and p.Character.Torso or p.Character.UpperTorso
    local particle = script.ParticleEmitter:Clone()
    particle.Parent = tor
end
function SSJHat()
    mod:ClearHats()
    local hair = script.Hat:Clone()
    hair.Parent = p.Character
end
--so this is how you use it:
--First let's get the chatted event
p.Chatted:connect(function(msg) --when the player chats
    if msg == "ssj" then --if what the player chatted is "ssj" then execute this:
        for i = 1, 5 do --for 5 times do this:
        ScreenAnims.FlashScreen() --Flashes your screen yellow
        wait()
        end
        mod:ChatFunction("AHHH!") --Make the player say AHHH!
        for i = 1, 20 do
            coroutine.resume(coroutine.create(function() TransformationAnims.RingExplosion() end))
            wait()
        end
        for xD = 1, 5 do
            spawn(function()
                TransformationAnims.SphereExplosion()
            end)
            wait()
        end
        ScreenAnims.FlashScreen()
        mod:ChatFunction("I'm going to DESTROY YOU!!!") --Make em say that
        SSJAura()
        SSJHat() --Now let's add loops and coolness :)
    end
end) --that's about it for the tutorial, you can always turn your graphics up to 10 and make it glow
--my pc is trash so it's gonna lag but i'll show u