speed script by Regalrific

local UserInputService = game:GetService("UserInputService")
local RunService = game:GetService("RunService")
local Players = game:GetService("Players")

local player = Players.LocalPlayer
local char = player.Character or player.CharacterAdded:Wait()
local hrp = char:WaitForChild("HumanoidRootPart")
local humanoid = char:WaitForChild("Humanoid")

-- speed
local walkSpeed = 16      
local runSpeed = 30
local currentSpeed = walkSpeed


local running = false

UserInputService.InputBegan:Connect(function(input, gpe)
    if gpe then return end
    if input.KeyCode == Enum.KeyCode.LeftShift then
        running = true
        currentSpeed = runSpeed
    end
end)

UserInputService.InputEnded:Connect(function(input, gpe)
    if input.KeyCode == Enum.KeyCode.LeftShift then
        running = false
        currentSpeed = walkSpeed
    end
end)


RunService.RenderStepped:Connect(function(dt)
    local moveDir = humanoid.MoveDirection
    if moveDir.Magnitude > 0 then
        
        hrp.CFrame = hrp.CFrame + (moveDir * currentSpeed * dt)
    end
end)