IntValue didn't being receive by scripts?

I was trying to make the health value down but I won't be update! and the original value is 10. when I test it the value is alr -4 but the value being print by the script is still stuck on 10!! HELP

if script.Parent.Health.Value == 10 then
    script.Parent.Grass1.Transparency = 0
    script.Parent.Grass1.Size = Vector3.new(.1,0.65,0.1)
elseif script.Parent.Health.Value >= 8 then
    print("level 2")
    script.Parent.Grass1.Size = Vector3.new(.1,0.93,0.1)
    script.Parent.Grass2.Transparency = 0
    script.Parent.Grass2.Size = Vector3.new(.1,0.7,0.1)
    wait(0.4)
    script.Parent.Grass3.Transparency = 0
    script.Parent.Grass3.Size = Vector3.new(.1,0.60,0.1)
end

while true and wait(1) do 
    print(script.Parent.Health.Value)
end

SOrry for broken english