How do I fix this? Animation and Tool the error I'm getting is attempt to index nil with 'Parent'

First I would like to say I apologize for what I done earlier, Second I have a error with my script, the error is attempt to index nil with 'Parent'

local tool = script.Parent
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local character = player.Character
while character.Parent == nil do
    character.AncestryChanged:Wait()
end
local leaderstats = player.leaderstats
local cooldown = 2
local ready = true
local humanoid = character:WaitForChild("Humanoid")
local animation = tool.Animation
local animationTrack = humanoid:LoadAnimation(animation)


tool.Activated:Connect(function()

    if ready == true then
    animationTrack:Play()
    --animationTrack.Looped = true
    print("Animation Played!")
    leaderstats.Strength.Value = leaderstats.Strength.Value + 1
    print("Strength Added!")
    ready = false
    animationTrack:Stop()
    wait(cooldown)
    print("Cooldown Done!")
    ready = true
    end
end)