Why does this "shake" camera script only move once?

So I made a fully functioning camera shake script(local script), and it only seemed to just transport downwards once and then just stop. It didn't go up and down like it's supposed to. What problem is there? Thanks

local c = workspace.CurrentCamera
local plr = game.Players.LocalPlayer
math.randomseed(tick())

plr.ShakeCamera.OnClientEvent:connect(function()
	c.CameraType = "Scriptable"
	for i = 1,10 do
		if plr.Character:FindFirstChild("Torso") then
			c.CFrame = c.CFrame + Vector3.new(0,-4,0)
			print("down")
		end
			wait(.1)
			
		if plr.Character:FindFirstChild("Head") then
			c.CFrame = c.CFrame + Vector3.new(0,4,0)
			print("up")
		end
	end
	c.CameraType = "Custom"
end)

This new script works when i tested it.

local c = workspace.CurrentCamera
local plr = game.Players.LocalPlayer
math.randomseed(tick())

plr.ShakeCamera.OnClientEvent:connect(function()
    c.CameraType = "Scriptable"
    for i = 1,10 do
        if plr.Character:FindFirstChild("Torso") then
            c.CFrame = c.CFrame + Vector3.new(0,-4,0)
            print("down")
        end
            wait(.1)

        if plr.Character:FindFirstChild("Head") then
            c.CFrame = c.CFrame + Vector3.new(0,4,0)
            print("up")
        end
	wait(.1)
    end
    c.CameraType = "Custom"
end)

You forgot a second wait so it just instantly jumped down and up again so visual nothing happened.