How do I make an explosion explode after a few seconds?

Hello. My goal is to make an explosion explode after about five seconds repeatedly, but I am having trouble doing so. I think I wrote the code sort of correctly, but I don't see the visual explosion. I don't want it to do any damage, I just want the visual effect to play every five seconds. Can somebody help?

while true do
	wait(5)
	explosion = Instance.new("Explosion")
	explosion.Parent = script.Parent
	explosion.ExplosionType = Enum.ExplosionType.Craters
	explosion.BlastRadius = 5
	wait(1)
	explosion:Destroy()
end