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.