How do I make a script that will make my part go visible to not visible?

I'm trying to make a part that will go transparent and then go visible again.. Whats wrong with it?

while true do
	script.Parent.Transparency = 0
	wait(1)
	script.Parent.Transparency = 1
end

I tested your original script and it really did not work so you need to add one more wait

while true do
	wait(1)
	script.Parent.Transparency = 0
	wait(1)
	script.Parent.Transparency = 1
end

and if you want to start with transparency 0 first, then you will have to set the part's transparency to 1 first, or you can use this script below

while true do
	script.Parent.Transparency = 1
	wait(1)
	script.Parent.Transparency = 0
end

The script you should be using should be a server script inside ServerScriptService. Here is the code you should put in

while true do
	wait(1)
	workspace["YourPart"].Transparency = 1
	wait(1)
	workspace["YourPart"].Transparency = 0
end