Sound is not valid member of part?

script.Parent.Sound:Play()
wait(1/5)
script.Parent.Fire.Enabled = false
wait(1)
script.Parent:Destroy()

This error means that Sound is not where you have told the script that it is. If the script is inside the Sound, then you should refer to it as script.Parent instead.

I hope this helps, please feel free to comment any questions!