Roblox Camera shake

local c = game.Workspace.Camera
repeat wait() until game.Players.LocalPlayer.Character
local hed = game.Players.LocalPlayer.Character:WaitForChild("Head")
local r = math.random
local rad = math.rad
function shake(times)
    c.CameraType = 'Scriptable'
    local Lv = CFrame.new(c.CFrame.lookVector)
    local amt = r(3,5)
    for i = 1, times do
        if hed.Parent.Humanoid.Health == 0 then break end
        c.CFrame = hed.CFrame * CFrame.new(0,0, 12)
        c.CFrame = c.CFrame * CFrame.Angles(rad(r(-r(), r())), rad(r(-r(), r())), rad(r(-amt, amt)))
        wait()
    end
    c.CameraType = 'Custom'
end