How do i fix this Warning? What Ever i do it turns into a Error.

You are indenting your code very strangely.

if, and elseif should always begin new lines.

if and then should be on the same line.

elseif and then should be on the same line.

The indent should increase after then and decrease at end.

Correctly formatted (using the above rules), your code looks like this:

if script.Parent.Parent.Visible == true then
	while true do 
		wait()
		local questiontochoosefrom = math.random(1,23)
		if questiontochoosefrom == 1 then 
			question.Text = "What is E1?"
			if textbox.Text == "Airman Basic" then 
				wait(35)
				correction.Text = "Correct"
			elseif correction.Text == "The Correct Answer is Airman Basic" then    
			end
			wait(35)
		end

This is clearly not right.

• The code isn't complete; the if and while are still open

• A while starting in an if that isn't in an event is probably not what you mean

• You compare correction.Text == "<some long message>" even though you don't set it...

• You ask a question, and then immediately check the answer....

• You have an empty elseif

• You have two instances of wait(35) inside the same loop