old_contents: var gulp = require('gulp'),
      gutil = require('gulp-util'),
      stylus = require('gulp-stylus'),
      clean = require('gulp-clean'),
      notify = require('gulp-notify'),
      livereload = require('gulp-livereload'),
      spawn = require('child_process').spawn;
  
  var server, supervisor,
      paths = {
         jade: 'views/**/*.jade',
         styl: 'views/css/**/*.styl',
         public: ['public/**/*']
      };
  
  gulp.task('style', function() {
     return gulp.src(paths.styl)
        .pipe(stylus())
        .pipe(gulp.dest('public/css'))
        // .pipe(notify({message: "Styles compiled"}))
        ;
  });
  
  gulp.task('reloaders', function() {
     server = livereload();
  
     supervisor = spawn('supervisor', ['-i', './public,./views', 'app.js']);
     supervisor.stdout.on('data', function(data) {
        process.stdout.write(data);
     });
     supervisor.stderr.on('data', function(data) {
        process.stderr.write(data);
     });
  });
  
  gulp.task('watch', ['reloaders'], function() {
     gulp.watch(paths.styl, ['style']);
  
     gulp.watch(paths.jade).on('change', reloadClient);
     gulp.watch(paths.public).on('change', reloadClient);
  });
  
  function reloadClient(ev) {
     server.changed(ev.path);
  }
  
  gulp.task('clean', function() {
     return gulp.src(['public/css/'], {read: false})
        .pipe(clean())
        // .pipe(notify(message: "Project cleaned"))
        ;
  });
  
  gulp.task('default', function() {
     gulp.start('style', 'watch');
  });
  
new_contents: var gulp = require('gulp'),
      gutil = require('gulp-util'),
      stylus = require('gulp-stylus'),
      clean = require('gulp-clean'),
      notify = require('gulp-notify'),
      livereload = require('gulp-livereload'),
      spawn = require('child_process').spawn;
  
  var server, supervisor,
      paths = {
         jade: 'views/**/*.jade',
         styl: 'views/css/**/*.styl',
         public: ['public/**/*']
      };
  
  gulp.task('style', function() {
     return gulp.src(paths.styl)
        .pipe(stylus())
        .pipe(gulp.dest('public/css'))
        // .pipe(notify({message: "Styles compiled"}))
        ;
  });
  
  gulp.task('reloaders', function() {
     server = livereload();
  
     supervisor = spawn('supervisor', ['-i', './public,./views', 'app.js'],
        { stdio: 'inherit' });
  });
  
  gulp.task('watch', ['reloaders'], function() {
     gulp.watch(paths.styl, ['style']);
  
     gulp.watch(paths.jade).on('change', reloadClient);
     gulp.watch(paths.public).on('change', reloadClient);
  });
  
  function reloadClient(ev) {
     server.changed(ev.path);
  }
  
  gulp.task('clean', function() {
     return gulp.src(['public/css/'], {read: false})
        .pipe(clean())
        // .pipe(notify(message: "Project cleaned"))
        ;
  });
  
  gulp.task('default', function() {
     gulp.start('style', 'watch');
  });
  
subject: make the same feature on creation time