i keep on having blue lines and also players is not a datamodel error?

this is the code i used. i am a noob at coding hence i used a guide to help me. The blue lined ones are my movedirection command. this is an dash code

local Userinputservice = game:GetService("UserInputService") local player = game.players.localplayer local animation = script:waitforchild('animation')

local key = Enum.keycode.F local velocity = 20000 local debounce = false local cooldown = 3 local duration = 0.10

local function dash() local character = player.character

if character and not debounce then
    debounce = true

    local humanoid = character.humanoid
    local HRP = character.humanoidrootpart

    local dashDirection = nil
    local loaded animation = humanoid.movedirection
    local lookvector = HRP.cframe.lookvector
    local minusvelocity = -velocity

    local isonground = humanoid.floormaterial ~= Enum.Material.Air and humanoid.floormaterial ~= Enum.Material.Water 
    if isonground then

if movedirection == Vector3.new(0,0,0) then

    dashDirection = HRP.position + Vector3.new(lookvector.X, 0, lookvector.Z)
else
    dashDirection = HRP.position + Vector3.new(moveDirection.X, 0, moveDirection.Z)
end
local bodygryo = Instance.new("BodyGyro")
bodygryo.Parent = HRP
bodygryo.MaxTorque = Vector3.new(math.huge, math.huge, math.huge)
bodygryo.D = 0
bodygryo.p = 500000
bodygryo.cframe = Vector3.lookat(HRP.position, dashDirection)

local attachment = Instance.new("attachment")
attachment.parent = HRP

local vectorforce = Instance.new("vectorforce")
vectorforce.parent = HRP
vectorforce.attachment0 = attachment
vectorforce.force = Vector3.new(0,0,minusvelocity)

LoadedAnimation:play()
humanoid.autorotate = false

wait(duration)

humanoid.autorotate = true

vectorforce:destroy()
bodygryo:Destroy()
attachment:destroy()

wait(duration * 2)

loadedanimation:stop()
    end
end

wait(cooldown)
end

Userinputservice.InputBegan:Connect(function(input) if input.KeyCode == key then dash() end end)