my grunt file

gistfile1.json

module.exports=function(grunt)
{
	grunt.initConfig({
		uglify:{
			files :{
				src : "js/*.js",
				dest : "js/jsmin/",
				flatten :true,
				expand :true,
				ext : ".min.js"
			}
		},
		cssmin : {
			files : {
				src : "css/*.css",
				dest : "css/cssmin/",
				flatten:true,
				expand:true,
				ext : ".min.css"
			}
		},
		sass  : {
			files : {
				cwd : "css/sass/",
				src : ["*.scss","*.sass"],
				dest : "css/",
				flatten : true,
				expand : true,
				ext : ".css"
				
			}
		},
		watch 	: {
				js 	: {	files	: "js/*.js",tasks			:["uglify"]},
				css 	: {	files	: "css/*.css",tasks			:["cssmin"]},
				sass 	: {	files	: "css/sass/*.scss",tasks	        :["sass"]}
			}
	});
	grunt.loadNpmTasks("grunt-contrib-sass");
	grunt.loadNpmTasks("grunt-contrib-uglify");
	grunt.loadNpmTasks("grunt-contrib-cssmin");
	grunt.loadNpmTasks("grunt-contrib-watch");
	grunt.registerTask('default',["sass","uglify","cssmin","watch"]);
}