local Players = game:GetService("Players")
local Workspace = game:GetService("Workspace")

local LocalPlayer = Players.LocalPlayer
local Character = LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait()
local HumanoidRootPart = Character:WaitForChild("HumanoidRootPart")

local checkpointsFolder = Workspace:WaitForChild("Checkpoints")
local leaderstats = LocalPlayer:WaitForChild("leaderstats")
local stageStat = leaderstats:WaitForChild("Stage")

print("script started")

while true do
    local currentStage = stageStat.Value
    local nextStage = currentStage + 1
    local cp = checkpointsFolder:FindFirstChild(tostring(nextStage))
    if not cp then
        local highestNum = 0
        local highestPart = nil
        for _, v in ipairs(checkpointsFolder:GetChildren()) do
            local num = tonumber(v.Name)
            if num and num > highestNum then
                highestNum = num
                highestPart = v
            end
        end
        
        if highestPart then
            local p = highestPart:IsA("BasePart") and highestPart or highestPart:FindFirstChildWhichIsA("BasePart")
            if p then
                HumanoidRootPart.CFrame = p.CFrame + Vector3.new(0, 3, 0)
            end
        end
        
        task.wait(0.01)
        cp = checkpointsFolder:FindFirstChild(tostring(nextStage))
    end
    if not cp then
        print(string.format("reached maximum stage: %d", stageStat.Value))
        break
    end
    
    local targetPart = cp:IsA("BasePart") and cp or cp:FindFirstChildWhichIsA("BasePart")
    if targetPart then
        HumanoidRootPart.CFrame = targetPart.CFrame + Vector3.new(0, 3, 0)
        task.wait(0.01)
        firetouchinterest(targetPart, HumanoidRootPart, 0)
        firetouchinterest(targetPart, HumanoidRootPart, 1)
        local t0 = tick()
        while stageStat.Value < nextStage and (tick() - t0) < 0.25 do
            task.wait(0.01)
        end
    end
    
    if stageStat.Value == currentStage then
        task.wait(0.1)
        if stageStat.Value == currentStage then
            warn(string.format("stopped at stage %d", currentStage))
            break
        end
    end
end