I'm terrible at uglifyify

gulpfile.js

var gulp = require('gulp');
var vinylSource = require('vinyl-source-stream');
var watchify = require('watchify');

gulp.task( 'browserify', function(){
	// use watchify instead of gulp-browserify and gulp.watch
	var bundler = watchify('./src/universe-experiment.js');
	bundler.transform('hbsfy');
	bundler.transform('uglifyify');
	var rebundle = function(){
		return bundler.bundle()
			.pipe( vinylSource('universe-experiment.js') )
			.pipe( gulp.dest('./') );
	};
	bundler.on( 'update', rebundle );
	return rebundle();
});

gulp.task( 'default', ['browserify'] );