Use sensible defaults for the blink patterns, and make use of it for the API blink.

src/api.coffee

@@ -11,10 +11,8 @@ api.use(express.bodyParser())
 
 api.post '/v1/blink', (req, res) ->
 	utils.mixpanelTrack('Device blink')
-	interval = setInterval(utils.blink, 400)
-	setTimeout(->
-		clearInterval(interval)
-	, 15000)
+	utils.blink.pattern.start()
+	setTimeout(utils.blink.pattern.stop, 15000)
 	res.send(200)
 
 api.post '/v1/update', (req, res) ->

src/lib/blink.coffee

@@ -24,9 +24,14 @@ module.exports = exports = (ledFile) ->
 			.then ->
 				start(pattern)
 		return {
-			start: (pattern) ->
+			start: (pattern = {}) ->
 				return false if blinking?
-				blinking = start(pattern)
+				fullPattern =
+					blinks: pattern.blinks ? 1
+					onDuration: pattern.onDuration ? 200
+					offDuration: pattern.offDuration ? 200
+					pause: pattern.pause ? 0
+				blinking = start(fullPattern)
 				return
 			stop: ->
 				return false if not blinking?

src/utils.coffee

@@ -61,8 +61,6 @@ exports.findIpAddrs = ->
 		.filter(Boolean)
 
 networkPattern =
-	onDuration: 200
-	offDuration: 200
 	blinks: 4
 	pause: 1000