how do i fix buy an item and put it in players backpack?

script.Parent.MouseButton1Click:connect(function()
	if currency.Value >=100 and not player.Backpack:FindFirstChild('GravityCoil')or player.Character:FindFirstChild('GravityCoil')then
		
		currency.Value = currency.Value - amount
		local newtool = tool:Clone()
		newtool.parent = player.Backpack -- this line is were it says the error is
	else
		script.Parent.Text = "Purchase Failed, Try again later"
		wait(0.5)
		script.Parent.Text = indextext
	end
end)

the error it gives in out put is this 22:13:59.127 - parent is not a valid member of Tool if you see a mistake please tell me.

when i click on the button it takes the money but doesn't give me the gravitycoil. the gravitycoil is in serverstorage