First demo commit.

src/entities/TimerEvent.lua

@@ -0,0 +1,12 @@
+local TimerEvent = class "TimerEvent"
+
+function TimerEvent:init(time, fn)
+	self.lifetime = time
+	self.timerCallback = fn
+end
+
+function TimerEvent:onLifeover()
+	self.timerCallback()
+end
+
+return TimerEvent