diff --git a/build.js b/build.js
new file mode 100644
index 0000000..ac29ba6
--- /dev/null
+++ b/build.js
@@ -0,0 +1,52 @@
+const fs = require('fs')
+const browserify = require('browserify')
+const babelify = require('babelify')
+const sass = require('node-sass')
+const watch = require('node-watch')
+
+let jsPath = {
+	get: './js/main.js',
+	put: './public/js/bundle.js'
+}
+
+let cssPath = {
+	get: './sass/style.sass',
+	put: './public/css/style.css'
+}
+
+const jsfy = () => {
+	browserify({ debug: true })
+		.transform(babelify)
+		.require(jsPath.get, { entry: true })
+		.bundle()
+		.on('error', function (err) { console.log('Error: ' + err.message) })
+		.pipe(fs.createWriteStream(jsPath.put))
+}
+
+const cssfy = () => {
+	sass.render({
+		file: cssPath.get
+	}, function (err, result) {
+		fs.writeFile(cssPath.put, result.css, (e) => {
+			if (e) console.log(console.log('[ERR] : ' + e))
+		})
+	})
+}
+
+function start() {
+	try {
+		jsfy()
+		cssfy()
+	} catch (e) {
+		console.log('[ERR] : ' + e)
+	}
+}
+
+start()
+
+watch(['js', 'sass'],
+	{
+		recursive: true
+	},
+	start
+)
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