Is "then" appropriate?

I am new to scripting. So forgive me for my mistake.

So I get the error

19:26:12.544 - Workspace.Script:4: 'then' expected near '='

when running this script

am = Workspace.AmmoCrate1.AmmoCrate

while true do
	if am.Amount.Value = 0
    wait(30)
    am.Amount.Value = am.Amount.Value + 1000

end

I'm trying to make it that if The AmmoCrate's Value hits 0, then it will wait for 30 seconds until its Value returns to 1000.

Well first, instead of using a while loop for this just use the Changed event

	am.Changed:connect(function()

	end)

Secondly an if statement should be used like this

if condition then
--code
end

You forgot both the then and the end.

And third when comparing two values you have to use == instead of just =

So it would be:

if value == 5 then

end

instead of

if value = 5 then

end

So if you put this altogehter the code would look like this

local am = Workspace.AmmoCrate1.AmmoCrate

am.Changed:connect(function() --use the changed event
	if am.Value == 0 then --if the value is 0
		am.Value = 1000 --change the value to 1000
	end --end the block of code
end)

You need two equal signs when using an if statement and then you need to follow it by a then. Thats why its called an if then statement

    if am.Amount.Value == 0 then