How to make a script repeat itself?

I am wandering how i can make this script repeat:

for i=1, 10 do
wait(5)
	local players = game.Players:GetChildren()
	print(#players)
	if #players >= 1 then
		local murder = players[math.random(1,#players)]
		local Knife = game.Lighting.Knife:Clone()
		Knife.Parent = murder.Backpack
		wait(10)
		end
	end

It keeps doing the wait(10) one, not going back to wait(5) then ten and again. Please help i am new at all this and am trying to make a game.

The best way to do this is by using

while true do
-- your script here