local Players = game:GetService("Players")

local FAST_SPEED = 49

local function setFastSpeed(character)
    local humanoid = character:FindFirstChildOfClass("Humanoid")
    if humanoid then
        humanoid.WalkSpeed = FAST_SPEED
    end
end

local function onCharacterAdded(character)
    setFastSpeed(character)
end

local function onPlayerAdded(player)
    player.CharacterAdded:Connect(onCharacterAdded)
    if player.Character then
        setFastSpeed(player.Character)
    end
end

Players.PlayerAdded:Connect(onPlayerAdded)

for _, player in Players:GetPlayers() do
    onPlayerAdded(player)
end