The most useless script ever!

coffee.coffee

argsarr = process.argv[2..]
args = {}
for i,k in argsarr
	if k%2 is 0
		args[i.replace(/--/,'')] = ~~argsarr[k+1]

log = (text)->
	if process.stdout
		process.stdout.clearLine()
		process.stdout.cursorTo 0
		process.stdout.write text
	else
		console.log text

class Brew
	empty : true
	content : 0
	size : 0
	refill : ->
		@content = @size
		@empty = false
	drink : ->
		@content--
		@empty = true if @content is 0
	constructor : (qty)->
		@size = qty
		@refill()

cups = 1
coffee = new Brew args.size
timer = setInterval ->
	if coffee.empty
		log "Time to get more coffee!!!"
		cups++
		coffee.refill()
	else
		coffee.drink()
		log "☕  x#{cups} Ahhh... warm coffee #{coffee.content}/#{coffee.size}"
,args.interval * 1000

run it with

$> coffee coffee.coffee --interval <time in seconds> --size <any positive int>