How do I create a complete ServerScriptService script that increases each player's WalkSpeed every second and syncs it to leaderstats while handling respawns correctly?

Question

AskAI Engine · Accepted Answer

This ServerScriptService script increases each alive player’s Humanoid.WalkSpeed by 1 every second and keeps a leaderstats value named Speed synchronized with the current WalkSpeed. It also handles character respawns by re-wiring connections whenever a new character is added. The script safely waits for the Humanoid to exist, avoids duplicate timers per player, and updates leaderstats immediately on spawn. Paste this as a single Script under ServerScriptService.ServerScriptService ScriptCode:-- ServerScriptService Script
-- Increases WalkSpeed by 1 every second while alive
-- Creates leaderstats with Speed matching WalkSpeed

local Players = game:GetService("Players")

-- How often to increment (seconds)
local INTERVAL = 1

-- Optional cap (set to nil for no cap)
local MAX_WALKSPEED = nil

-- Per-player state
local playerState = {} -- [player] = { timerRunning = bool, connections = {}, humanoid = Humanoid|nil }

local function getHumanoidAndRoot(character)
	if not character then return nil end
	local humanoid = character:FindFirstChildOfClass("Humanoid")
	return humanoid
end

local function ensureLeaderstats(player)
	local leaderstats = player:FindFirstChild("leaderstats")
	if not leaderstats then
		leaderstats = Instance.new("Folder")
		leaderstats.Name = "leaderstats"
		leaderstats.Parent = player
	end

local speedValue = leaderstats:FindFirstChild("Speed")
	if not speedValue then
		speedValue = Instance.new("IntValue")
		speedValue.Name = "Speed"
		speedValue.Value = 0
		speedValue.Parent = leaderstats
	end

return leaderstats, speedValue
end

local function syncSpeedToLeaderstats(player, humanoid)
	local _, speedValue = ensureLeaderstats(player)
	if not humanoid then
		-- If humanoid is missing, keep current value.
		return
	end
	-- WalkSpeed is a number; leaderstats Speed is IntValue.
	speedValue.Value = math.floor(humanoid.WalkSpeed + 0.00001)
end

local function stopTimerForPlayer(player)
	local state = playerState[player]
	if not state then return end
	state.timerRunning = false

for _, conn in ipairs(state.connections) do
		pcall(function() conn:Disconnect() end)
	end
	state.connections = {}
end

local function startTimerForPlayer(player, humanoid)
	local state = playerState[player]
	if not state then return end
	if state.timerRunning then return end
	state.timerRunning = true

-- Ensure leaderstats exists and is synced immediately
	syncSpeedToLeaderstats(player, humanoid)

-- Increment loop
	task.spawn(function()
		while state.timerRunning do
			-- Validate humanoid still exists and player still alive
			if not player.Parent then break end
			if not humanoid or humanoid.Parent == nil then break end
			if humanoid.Health  0 then
			startTimerForPlayer(player, humanoid)
		end
	end
end

local function onPlayerAdded(player)
	playerState[player] = { timerRunning = false, connections = {}, humanoid = nil }

-- Create leaderstats immediately
	ensureLeaderstats(player)

-- Handle current and future characters
	if player.Character then
		onCharacterAdded(player, player.Character)
	end

local charConn = player.CharacterAdded:Connect(function(character)
		onCharacterAdded(player, character)
	end)
	table.insert(playerState[player].connections, charConn)
end

local function onPlayerRemoving(player)
	stopTimerForPlayer(player)
	playerState[player] = nil
end

Players.PlayerAdded:Connect(onPlayerAdded)
Players.PlayerRemoving:Connect(onPlayerRemoving)

-- Connect existing players (if script runs after players joined)
for _, player in ipairs(Players:GetPlayers()) do
	onPlayerAdded(player)
end
Notes: If you want a different increment rate, change INTERVAL. If you want WalkSpeed to reset on respawn, you can set humanoid.WalkSpeed to a base value inside onCharacterAdded before starting the timer.

How do I create a complete ServerScriptService script that increases each player's WalkSpeed every second and syncs it to leaderstats while handling respawns correctly?

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