How do I get my Day/Night script to not turn to night quickly and have it to repeat?

"QUICK, GET AN LUAMBULANCE!" (ha ha ha. get it?)

I am in the middle of making an Day/Night script and this is how it went.

if true do
	game.Lighting:SetMinutesAfterMidnight(12 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(18 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(00 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(6 * 1)
	wait(1)
end

Whenever I run/test the game it would say the following:

ServerScriptService.DayNightScript:1: 'then' expected near 'do'

So I followed the instructions and made the changes to the script and this is what i got.

if true then do
	game.Lighting:SetMinutesAfterMidnight(12 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(18 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(00 * 1)
	wait(1)
	game.Lighting:SetMinutesAfterMidnight(6 * 1)
	wait(1)
end
end

Now when i run the game this time, the script changed the day to night as soon as i started and it won't repeat itself. It's kinda weird so please help me. I'm just starting out as a scripter. Thanks in advance. I want to be original as possible!

Peace!

while true do
    game.Lighting:SetMinutesAfterMidnight(12 * 1)
    wait(5)
    game.Lighting:SetMinutesAfterMidnight(18 * 1)
    wait(5)
    game.Lighting:SetMinutesAfterMidnight(00 * 1)
    wait(5)
    game.Lighting:SetMinutesAfterMidnight(6 * 1)
    wait(5)
end

This may work

try

while true do
    game.Lighting:SetMinutesAfterMidnight(12 * 1)
    wait(1)
    game.Lighting:SetMinutesAfterMidnight(18 * 1)
    wait(1)
    game.Lighting:SetMinutesAfterMidnight(00 * 1)
    wait(1)
    game.Lighting:SetMinutesAfterMidnight(6 * 1)
    wait(1)
end
end