Sample gulpfile.js with using express

gulpfile.js

var gulp    = require('gulp'),
    compass = require('gulp-compass'),
    express = require('express'),
    gutil   = require('gulp-util'),
    path    = require('path'),
    refresh = require('gulp-livereload'),
    server  = require('tiny-lr')();

gulp.task('expressServer', function(){
  app = express();
  app.use(require('connect-livereload')());
  app.use(express.static('public/'));
  app.listen(4000);
});

gulp.task('html', function(){
  gulp.src('src/**/*.html')
      .pipe(gulp.dest('public/'))
      .pipe(refresh(server));
})

gulp.task('sass', function(){
  gulp.src('src/stylesheets/**/*.sass')
      .pipe(compass({ config_file: 'config.rb', sass: 'src/stylesheets/', css: 'public/assets/stylesheets/' }))
      .pipe(gulp.dest('public/assets/stylesheets/'))
      .pipe(refresh(server));
});

gulp.task('default', ['expressServer', 'html', 'sass'], function() {
  server.listen(35729, function (error) {
    if (error) return console.log(error);

    gulp.watch('src/stylesheets/**/*.sass', function () {
      gulp.run('sass');
    });

    gulp.watch('src/**/*.html', function () {
      gulp.run('html');
    });
  });
});