events.lua

local events = {
  events = {}
}

function events:on(event, callback)
	if not self then return end
	if not self.events[event] then
		self.events[event] = {}
	end

	table.insert(self.events[event], callback)
end

function events:emit(event)
	if not self then return end
	if not self.events[event] then return end

	for i = 1, #self.events[event] do
		self.events[event][i]()
	end
end

events:on('bla', function()
	print('function 1')
end)
events:on('bla', function()
	print('function 2')
end)
events:emit('bla')