How do I allow the part to keep moving if the key is down?

At the moment, you have to press the "W" key each time to move one stud, however. I want it so if you hold the W key down, the part will keep going forward until the key is not being held anymore. Any ideas on how to fix this?

game:GetService("UserInputService").InputBegan:connect(onKeyPress)
local UserInputService = game:GetService("UserInputService")
local LetterW = Enum.KeyCode.W
local function IsLetterDown()
	return UserInputService:IsKeyDown(LetterW) 
end
local function Input(input, gameProcessedEvent)
	if not IsLetterDown() then
		wait(1)
	else
		if FreeCam == true then -- The variables for FreeCam are already set.
			game.Workspace.Camera.Blobby.Position = Vector3.new(game.Workspace.Camera.Blobby.Position.X+1, game.Workspace.Camera.Blobby.Position.Y, game.Workspace.Camera.Blobby.Position.Z)
		end
	end
end

Thank you.

local UserInputService = game:GetService("UserInputService") --The service we will be using to detect inputs.

local Blobby = workspace.Camera:WaitForChild("Blobby") --"Blobby", the part that we will be moving.
local ButtonIsDown = false --The variable we will be using to define if the W button is down or not.

local InputBegan = function(Key) --The function for when an input begins.
    if Key.KeyCode == Enum.KeyCode.W then --If the input is "Enum.KeyCode.W", which is obviously the W key, then:
        ButtonIsDown = true --Set ButtonIsDown to true.
    end
end

local InputEnded = function(Key) --The function for when an input ends.
    if Key.KeyCode == Enum.KeyCode.W then --If the input being released is "Enum.KeyCode.W", which is obviously the W key, then:
        ButtonIsDown = false --Set ButtonIsDown to false.
    end
end

UserInputService.InputBegan:Connect(InputBegan)
UserInputService.InputEnded:Connect(InputEnded)

while wait() do --An infinite loop to make sure that Blobby keeps moving everytime ButtonIsDown is true.
    if ButtonIsDown then --If the W key is being held, then:
        Blobby.Position = Vector3.new(Blobby.Position.X + 1, Blobby.Position.Y, Blobby.Position.Z) --Move Blobby's X position by 1 stud.
    end
end

You should try this instead.

So while infinite loops are generally frowned upon, I believe in this case it would be beneficial.

if keyIsPressed then
    while true do
        --camera movement
        if keyReleaseDetected then
            break
        end
    end
end

It would cut down on the input lag due to only needing to check for the keypress once.