How do I animate a sword from a script?

Hi!

I'm experiencing a problem with my sword's animations.

Here's the localscript:

local Tool = script.Parent;
local click = tick()


Tool.Equipped:connect(function(mouse)
    mouse.Button1Down:connect(function()

        if tick() - click < 0.8 then
        local anim = Instance.new("StringValue")
        anim.Name = "toolanim"
        anim.Value = "Lunge"
        anim.Parent = Tool 
        else
            local anim2 = Instance.new("StringValue")
        anim2.Name = "toolanim"
        anim2.Value = "Lunge"
        anim2.Parent = Tool 
        end
    end)

I'm trying to make it lunge when the player double clicks it and slash when the player clicks one time but no animations happen :(