Add an item into an animation?

so ive got a brick, when u hold ur mouse on it it gives gold overtime and repeats and animation which looks like you're holding a fishing pole....problem is, you arent holding a fishing pole :(

so im wondering, how do u make an item appear when an animation is played, or make an item appear when the script is used if that makes sense....so when im holding my mouse down on the brick it plays my animation where my arms move forward as if they are holding a pole then a fishing pole appears so it looks like im fishing, ive got the model and script, i just dont know how to mix them together lol

here is the script

script.Parent.ClickDetector.MouseClick:connect(function(player)
    local leftMouseDown = true
    player:GetMouse().Button1Up:connect(function() 
        leftMouseDown = false 
    end)
    wait(1)

    spawn(function()
    while leftMouseDown do
        local animationTrack = player.Character.Humanoid:LoadAnimation(script.FishingAnimation)
        animationTrack:Play()
        wait(1)
        end
    end)
    spawn(function()
        while leftMouseDown do
        player.leaderstats.Gold.Value = player.leaderstats.Gold.Value + 10 
        wait(math.random(1,10))
        end
    end)


end)