Roblox Script Generated by ScripterAI

"make me a sprint bar with shift to sprint"

-- local script (StarterGUI) 
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local userinputservice = game:GetService("UserInputService")

local screenGui = Instance.new("ScreenGui", player.PlayerGui)

local sprintBar = Instance.new("Frame", screenGui)
sprintBar.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
sprintBar.BorderSizePixel = 0
sprintBar.Size = UDim2.new(0.2, 0, 0.025, 0)
sprintBar.Position = UDim2.new(0.4, 0, 0.9, 0)

local fillBar = Instance.new("Frame", sprintBar)
fillBar.BackgroundColor3 = Color3.fromRGB(0, 255, 0)
fillBar.BorderSizePixel = 0
fillBar.Size = UDim2.new(1, 0, 1, 0)

local sprinting = false
local maxSprint = 100
local currentSprint = maxSprint
local sprintRechargeRate = 2
local sprintDrainRate = 5

local function updateSprintBar()
    fillBar.Size = UDim2.new(currentSprint / maxSprint, 0, 1, 0)
end

local function sprint(input, gameProcessed)
    if input.KeyCode == Enum.KeyCode.LeftShift and not gameProcessed then
        sprinting = not sprinting
        if sprinting then
            humanoid.WalkSpeed = humanoid.WalkSpeed * 1.5
        else
            humanoid.WalkSpeed = humanoid.WalkSpeed / 1.5
        end
    end
end

userinputservice.InputBegan:Connect(sprint)

while true do
    task.wait(0.1)
    if sprinting and currentSprint > 0 then
        currentSprint = currentSprint - sprintDrainRate
        if currentSprint < 0 then
            currentSprint = 0
            sprinting = false
            humanoid.WalkSpeed = humanoid.WalkSpeed / 1.5
        end
    elseif not sprinting and currentSprint < maxSprint then
        currentSprint = currentSprint   sprintRechargeRate
        if currentSprint > maxSprint then
            currentSprint = maxSprint
        end
    end
    updateSprintBar()
end