gulpfile.js

var gulp = require('gulp');
var sass = require('gulp-sass');

gulp.task('sass', function() {
return gulp.src('./css/scss/*.scss')
.pipe(sass().on('error', sass.logError))
.pipe(gulp.dest('./css'));
});

gulp.task('sass:watch', function() {
gulp.watch(['./css/scss/*.scss'], ['sass']);
})

// General build task
gulp.task('build', ['sass'], function() {

});

// Developer mode
gulp.task('dev', ['sass','sass:watch'], function() {

});