How would I make a function that checks if a value of something is below 0?

Ive tried using

function CheckToBreak()
if script.Parent.ValueA.Value <= 0 then
    script.Parent.ValueA.Value = 9999999
    local Clone1 = game.ReplicatedStorage.Parts.Part:Clone()
    local Clone2 = game.ReplicatedStorage.Parts.Part:Clone()
    Clone1.Position = Vector3.new(script.Parent.Position)
    Clone1.Position = Vector3.new(script.Parent.Position)
    Clone2.Position = Vector3.new(script.Parent.Position)
    Clone2.Position = Vector3.new(script.Parent.Position)
    script.Parent:Destroy()
    else print(no)
end

script.Parent.ValueA.Value.Changed:connect(CheckValue)

But it doesnt work. Help?