Vector3.new and Key issue?

Ive got a script which moves a brick left and right and forward and backwards. When I hold "J" it smoothly continues right, same when i press "G" it smoothly goes left. "Y" and "H" doesnt move forward and backward smoothly. Im not sure why, also I have no errors. The functions are located at the bottom

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local y,g,h,j = 0,0,0,0
Mouse.KeyDown:connect(function(Key)
    print("cheese")
    if Key == "j" then
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(1,0,0)
        j = 1
        keyholdJ()
    elseif Key == "g" then
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(-1,0,0)
        g = 1
        keyholdG()
    elseif Key == "y" then
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(0,0,-1)
        h = 1
        keyholdY()
    elseif Key == "h" then
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(0,0,1)
        y = 1
        keyholdH()
    end
end)

Mouse.KeyUp:connect(function(Key)
    print("cheese")
    if Key == "j" then
        j = 0
    elseif Key == "g" then
        g = 0
    elseif Key == "y" then
        h = 0
    elseif Key == "h" then
        y = 0
    end
end)

--functions of holding down

function keyholdJ()
    while j == 1 do
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(1,0,0)
        wait(0.01)
    end
end

function keyholdG()
    while g == 1 do
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(-1,0,0)
        wait(0.01)
    end
end

function keyholdH()
    while h == 1 do
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(0,0,-1)
        wait(0.01)
    end
end

function keyholdY()
    while y == 1 do
        game.Workspace.CameraBlock.Position = game.Workspace.CameraBlock.Position + Vector3.new(0,0,1)
        wait(0.01)
    end
end