Skill animation won't play on button press?

I've made an animation, and exported it. I'm trying to make the animation play when the player presses one, but it doesn't play. How do I fix it?

This script is located in a LocalScript in StarterPack:

player = game.Players.LocalPlayer
local fireballanimation = Instance.new("Animation", player.Character)
fireballanimation.AnimationId = "rbxassetid://319164260"
fireballanimation.Name = "Fireball Animation"

local animFireball = player.Character.Humanoid:LoadAnimation(fireballanimation)

function fireball()
    animFireball:Play()
    -- Fireball happens
end


function keybarClick()
    if s1s == "Fireball" then
        if fireballcooldown == false then
            fireballcooldown = true

            fireball()

            wait(fireballcdt)
            fireballcooldown = false
            print("Fireball ready")
        end
        end
end 

function skillCheck(inputObject, gameProcessedEvent)

    if inputObject.KeyCode == Enum.KeyCode.One then
        keybarClick()
    end
end 

Thanks in advance!