Grimrock

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function start(self, receiverID, callback, delay, name)
	
	if not name then name = "timer_spawn_"..receiverID end
	
	local t = spawn("timer", self.level, self.x, self.y, 0, name)
    t:setTimerInterval(delay)
    t:addConnector("activate", receiverID, callback)
    t:addConnector("activate", t.id, "deactivate") 
	t:addConnector("activate", t.id, "destroy") 
    t:activate()
	
	return t
end

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self (don't pass this in, it just shows up, is this a Lua thing?)
receiverID - the ID of the script entity (or other object) to call when the timer finishes
callback - the name of the function to call on the receiver when the timer finishes
delay - how long (in seconds) to delay for
name [optional] - the unique ID of the timer.  You should supply this (see example below)

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function doSomething()
  print("starting timer")
   timer =  sleep:start(self.id, "_callback", 10, "a_unique_id_for_the_timer_you_make")
end

function _callback()
   print("timer finished")
end

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cloneObject{
	name = "dungeon_fake_pit",
	baseObject = "pressure_plate_hidden" -- using this as the base object has the nice benefit of tilting the camera down slightly
	model = "assets/models/env/dungeon_pit.fbx", -- you can use another pit model for temple or prison
	hidden = false,
	editorIcon = 40, -- pit icon
}

defineParticleSystem{
   name = "screen_wipe",
   emitters = {
      -- glow
      {
         spawnBurst = true,
         emissionRate = 20,
         emissionTime = 0,
         maxParticles = 20,
         boxMin = {0,0,0},
         boxMax = {0,0,0.2},
         sprayAngle = {0,360},
         velocity = {0,0},
         texture = "assets/textures/particles/glow.tga",
         lifetime = {2, 2},
         colorAnimation = false,
         color0 = {0.0, 0.0, 0.0},
         opacity = 1,
         fadeIn = 1,
         fadeOut = 1,
         size = {5, 5},
         gravity = {0,0,0},
         airResistance = 0.3,
         rotationSpeed = 1,
         blendMode = "Translucent",
         objectSpace = true,
      }
   }
}

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-- Ladder Change Function.

dlevel = self.level
dx = self.x
dy = self.y
df = self.facing

function setDestination(ignore,x,y,f,level)
	dx = x
	dy = y
	df = f
	dlevel = level
end

function activate()
	playSound("party_enter_stairs")
	party:playScreenEffect("screen_wipe")
	stopParty:freezeParty() -- search for cMove for this explanation
	sleep:start(self.id, "_teleport", 0.8, "ladder_timer_1")
end

function _teleport()
	t = spawn("teleporter", party.level, party.x, party.y, df, _teleportID(self.id))
	t:setTriggeredByParty(true)
	t:setChangeFacing(true)
	t:setInvisible(true)
	t:setSilent(true)
	t:setHideLight(true)
	t:setScreenFlash(false)
	t:setTeleportTarget(dx,dy,df,dlevel)
	t:activate()
	sleep:start(self.id, "_finish", 0.1, "ladder_timer_2") -- note the need for a unique timer ID here.  The first timer still exists during this callback.
end

function _finish()
	t = findEntity(_teleportID(self.id))
	t:deactivate()
	t:destroy()
	stopParty:thawParty()  -- search for cMove for this explanation
end

function _teleportID(objectID) -- shortcut for a unique ID for the teleporter
	return "teleporter_"..objectID
end

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function onStep()
	ladder:setDestination(party.x+1,party.y,party.facing,party.level) -- set the destination like you would for a teleport
	ladder:activate()
end

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function sleep()
     party:rest()
end
function wake up()
     party:wakeUp(false)
end

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defineObject{
     name = "dungeon_ ladder",
     class = "Pit",
     model = "your path",
     trapDoorModel = "you other path",
     openAnim = "your other,other path",
     closeAnim = "your others, others, other path",
     placement = "floor",
     editorIcon = 36,
     -- Then here you'd add your complicated scripting on the ladder
}

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-- simple one image cinematic
enableUserInput()
startMusic("assets/samples/music/intro.ogg")

-- show the image
showImage("assets/textures/cinematic/intro/page01.tga")
fadeIn(2)
sleep(4)
fadeOut(4)

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-- Called by a wall button connected to a script named 'job'.
function button()
Sleep.start(Sleep, "job", "work", 5, "timer_2")
-- "work" simply hudPrints a message.
end

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cloneObject{
    doSomething = function()
        print("something")
    end
}