diff --git a/README.md b/README.md
index 7ecada3f..c95cd583 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ![logo](http://trigen.pro/colalogo.png)
 
-ColaScript is a language that compiles in JavaScript. This language is similar to Dart, CoffeeScript, Python and PHP, with some original ideas. Compiler based on [UglifyJS2](https://github.com/mishoo/UglifyJS2). In present time compiler in development. Play with language you can in `lib/index.html`.
+ColaScript is a language that compiles in JavaScript. This language is similar to Dart, CoffeeScript, Python and PHP, with some original ideas. Compiler based on [UglifyJS2](https://github.com/mishoo/UglifyJS2). In present time compiler in development. Play with language you can [here](http://develop.trigen.pro/cola/).
 
 # to do:
 
@@ -326,4 +326,4 @@ ColaScript is a language that compiles in JavaScript. This language is similar t
 ### Statistic
 
 - 34 feature ( without classes )
-- 23 done
+- 26 done
diff --git a/demo.cola b/demo.cola
index 8a8f01d9..d1ab38e6 100644
--- a/demo.cola
+++ b/demo.cola
@@ -1,51 +1,102 @@
+// `main` functions may binding to a onload event 
+// Functions can defined without `function` keyword, with and without `type`
 main(){
+
+    // Unary operators
+    // Two variants of `isset` operator. Which is better?
+    bool _seted = true, _empty;
+    console.log("`_seted` is", _seted?? ? "seted" : "empty");
+    console.log("`_empty` is", isset _empty ? "seted" : "empty");
+
+    // `clone` operator 
+    Array _first = [584], _second = clone _first;
+    _first.push(404);
+    console.log("`_first`:",_first,"`_second`:",_second);
+
+    // Binary operators
+    // `pow` operator
+    console.log("5 ** 3 =", 5 ** 3);
+
+    // `modulo` operator
+    console.log("10 %% 4 = ", 10 %% 4);
+
+    // `isset` conditional assigment
+    int a, b = 4;
+    console.log("`a` is", a, ", now `a` is", a ?= b); 
+    console.log("`a` is", a, ", now `a` still", a ?= 584);
+
+    // `isset` binary conditional
+    int x, y = 5;
+    console.log("`x` is", x, ", `y` is", y, ", x ? y = ", x ? y), x = 1;
+    console.log("`x` is", x, ", `y` is", y, ", x ? y = ", x ? y);
+
+    // `is` operator
+    console.log("'hello'", "hello" is String ? "is" : "isnt", "`String`");
+
+    // `isnt` operator
+    console.log("'goodby'", "goodby" isnt Number ? "isnt" : "is", "`Number`");
+
+    // Boolean alternatives
+    console.log("`yes` and `no`", yes is Boolean && no is Boolean ? "is" : "isnt", "`Boolean`");
+    console.log("`on` and `off`", on is Boolean && off is Boolean ? "is" : "isnt", "`Boolean`");
+
+    // Strings
+    // New quotes symbol, multi-lining and templating
     console.log(`
 
         Hello!
         My name is ColaScript, and i know who you are }:->
-        @{navigator.userAgent}
+        User agent: @{navigator.userAgent}
+        Vendor: {{navigator.vendor}}
 
     `);
 
-    console.log("pow:", 5 ** 2, "; modulo:", 5 %% 3, ";");
+    // Raw strings
+    console.log(r"\n \r \t some@email.ru");
 
-    Number a = 3.14, b = 584, c;
-
-    a ?= b; console.log(a);
-    a = undefined;
-    a ?= b; console.log(a);
-
-    console.log(a = c ? b);
-    c = 404;
-    console.log(a = c ? b);
-
-    b = undefined;
-
-    Array x, y;
-    x = [123];
-    y = clone x;
-    y[] = 321;
-    console.log('original:',x,'cloned:',y, y[]);
-
-    y[0..1] = [1..10];
-    console.log(y[0..4]);
-
-    y.forEach((val) => console.log(val));
-
-    console.log("a is {{isset a ? 'set' : 'undefiend'}}, b is {{b?? ? 'set' : 'undefined'}}");
-
-    console.log(`is:`, location.href is String, `; isnt:`, 123 isnt Number, ";");
-
-    if(yes === true && on === true && no === false && off === false) console.log('Boolean alternatives');
-
-    console.log('Raw string:', r`@test \n \t \r`);
+    // Multiline RegExp's
     RegExp isEmail = /
         ([\w-\.]+)
         @
         ((?:[\w]+\.)+)
         ([a-zA-Z]{2,4})
-    /, email = r'danon0404@gmail.com';
-    console.log("@email is email:", isEmail.test(email));
+    /; 
+    String email = r'some@email.ru';
+    console.log("@email {{ isEmail.test(email) ? "is" : "isnt" }} valid email adress");
+
+    // Arrays
+    // Empty getter and setter ( pushig )
+    Array arr = [2, 4, 8, 16, 32];
+    console.log("Last element of `arr` is", arr[]), arr[] = 64;
+    console.log("Now last element of `arr` is", arr[]);
+
+    // Splice assigment
+    arr[2..4] = [3, 2, 1];
+    console.log("`arr` is", arr);
+
+    // Range
+    console.log("`[0..10]` is", [0..10]);
+
+    // Calling function
+    console.log(Profile(
+        "Dan", "Green",
+        "HTML5", "JavaScript", "Dart", "PHP", "CSS3", "LESS", "Qt",
+        age : 19,
+        petName : "Felix"
+    ));
 }
 
-main();
\ No newline at end of file
+// Functions
+// Named, positional and splated arguments, with default values.
+// Arrow functions.
+Object Profile(String firstName, String secondName, String country = "Russia", Array skills..., age:, petName: "Tux"){
+    skills.forEach((val) => val == "JavaScript" && console.log("JavaScript - It Awesome!"));
+    return {
+        firstName : firstName,
+        secondName : secondName,
+        age : age,
+        country : country,
+        skills : skills,
+        petName : petName
+    };
+}
diff --git a/lib/index.html b/lib/index.html
index 4dd1bdcb..c3a3ebac 100644
--- a/lib/index.html
+++ b/lib/index.html
@@ -27,12 +27,14 @@
     	}
     	
     	textarea {
+            -moz-box-sizing: border-box;
     		box-sizing: border-box;
     	    width: 33.333%; 
     	    height: 100%; 
     	    font-size: 12px; 
     	    float: left;
     	    font-family: "Andale Mono";
+            padding: 0 5px 26px 5px;
     	}
 
     	#controls {
@@ -60,61 +62,118 @@
             background-color: white;
             opacity: 0.5;
         }
+
+        #lenstat {
+            float: right;
+            margin: 5px 8px 0 0;
+        }
     	
     	</style>
 	</head>
 	<body>
-		<textarea id="source" onkeyup="compile()">main(){
+		<textarea id="source" onkeyup="compile()">// `main` functions may binding to a onload event 
+// Functions can defined without `function` keyword, with and without `type`
+main(){
+
+    // Unary operators
+    // Two variants of `isset` operator. Which is better?
+    bool _seted = true, _empty;
+    console.log("`_seted` is", _seted?? ? "seted" : "empty");
+    console.log("`_empty` is", isset _empty ? "seted" : "empty");
+
+    // `clone` operator 
+    Array _first = [584], _second = clone _first;
+    _first.push(404);
+    console.log("`_first`:",_first,"`_second`:",_second);
+
+    // Binary operators
+    // `pow` operator
+    console.log("5 ** 3 =", 5 ** 3);
+
+    // `modulo` operator
+    console.log("10 %% 4 = ", 10 %% 4);
+
+    // `isset` conditional assigment
+    int a, b = 4;
+    console.log("`a` is", a, ", now `a` is", a ?= b); 
+    console.log("`a` is", a, ", now `a` still", a ?= 584);
+
+    // `isset` binary conditional
+    int x, y = 5;
+    console.log("`x` is", x, ", `y` is", y, ", x ? y = ", x ? y), x = 1;
+    console.log("`x` is", x, ", `y` is", y, ", x ? y = ", x ? y);
+
+    // `is` operator
+    console.log("'hello'", "hello" is String ? "is" : "isnt", "`String`");
+
+    // `isnt` operator
+    console.log("'goodby'", "goodby" isnt Number ? "isnt" : "is", "`Number`");
+
+    // Boolean alternatives
+    console.log("`yes` and `no`", yes is Boolean && no is Boolean ? "is" : "isnt", "`Boolean`");
+    console.log("`on` and `off`", on is Boolean && off is Boolean ? "is" : "isnt", "`Boolean`");
+
+    // Strings
+    // New quotes symbol, multi-lining and templating
     console.log(`
 
         Hello!
         My name is ColaScript, and i know who you are }:->
-        @{navigator.userAgent}
+        User agent: @{navigator.userAgent}
+        Vendor: {{navigator.vendor}}
 
     `);
 
-    console.log("pow:", 5 ** 2, "; modulo:", 5 %% 3, ";");
+    // Raw strings
+    console.log(r"\n \r \t some@email.ru");
 
-    Number a = 3.14, b = 584, c;
-
-    a ?= b; console.log(a);
-    a = undefined;
-    a ?= b; console.log(a);
-
-    console.log(a = c ? b);
-    c = 404;
-    console.log(a = c ? b);
-
-    b = undefined;
-
-    Array x, y;
-    x = [123];
-    y = clone x;
-    y[] = 321;
-    console.log('original:',x,'cloned:',y, y[]);
-
-    y[0..1] = [1..10];
-    console.log(y[0..4]);
-
-    y.forEach((val) => console.log(val));
-
-    console.log("a is {{isset a ? 'set' : 'undefiend'}}, b is {{b?? ? 'set' : 'undefined'}}");
-
-    console.log(`is:`, location.href is String, `; isnt:`, 123 isnt Number, ";");
-
-    if(yes === true && on === true && no === false && off === false) console.log('Boolean alternatives');
-
-    console.log('Raw string:', r`@test \n \t \r`);
+    // Multiline RegExp's
     RegExp isEmail = /
         ([\w-\.]+)
         @
         ((?:[\w]+\.)+)
         ([a-zA-Z]{2,4})
-    /, email = r'danon0404@gmail.com';
-    console.log("@email is email:", isEmail.test(email));
+    /; 
+    String email = r'some@email.ru';
+    console.log("@email {{ isEmail.test(email) ? "is" : "isnt" }} valid email adress");
+
+    // Arrays
+    // Empty getter and setter ( pushig )
+    Array arr = [2, 4, 8, 16, 32];
+    console.log("Last element of `arr` is", arr[]), arr[] = 64;
+    console.log("Now last element of `arr` is", arr[]);
+
+    // Splice assigment
+    arr[2..4] = [3, 2, 1];
+    console.log("`arr` is", arr);
+
+    // Range
+    console.log("`[0..10]` is", [0..10]);
+
+    // Calling function
+    console.log(Profile(
+        "Dan", "Green",
+        "HTML5", "JavaScript", "Dart", "PHP", "CSS3", "LESS", "Qt",
+        age : 19,
+        petName : "Felix"
+    ));
 }
 
-main();</textarea>
+// Functions
+// Named, positional and splated arguments, with default values.
+// Arrow functions.
+Object Profile(String firstName, String secondName, String country = "Russia", Array skills..., age:, petName: "Tux"){
+    skills.forEach((val) => val == "JavaScript" && console.log("JavaScript - It Awesome!"));
+    return {
+        firstName : firstName,
+        secondName : secondName,
+        age : age,
+        country : country,
+        skills : skills,
+        petName : petName
+    };
+}
+</textarea>
 		<textarea id="translation"></textarea>
 		<textarea id="result"></textarea>
 		<div id="controls">  
@@ -124,6 +183,8 @@ main();</textarea>
                 <button id="benchmark" onclick="benchmark()">Benchmark</button>
                 <input type="checkbox" id="is_js" onclick="compile()">
                 <label for="is_js">js parser</label>
+                <input type="checkbox" id="main_binding" onclick="compile()">
+                <label for="main_binding">`main` binding</label>
                 <span id="lenstat"></span>
             </div>
 	</body>
@@ -132,16 +193,19 @@ main();</textarea>
 			translationArea = document.getElementById("translation"), 
 			resultArea = document.getElementById("result"), 
             isjs = document.getElementById("is_js"),
+            mainbinding = document.getElementById("main_binding"),
 			source;
 
         if(!localStorage.source) localStorage.source = source = sourceArea.value;
 		else sourceArea.value = source = localStorage.source;
         isjs.checked = localStorage.isjs == "t";
+        mainbinding.checked = localStorage.mainbinding == "t";
 
 		function compile(){
 			source = sourceArea.value;
 			localStorage.source = source;
             localStorage.isjs = isjs.checked ? "t" : "f";
+            localStorage.mainbinding = mainbinding.checked ? "t" : "f";
 
 			stream = new Cola.OutputStream({ beautify : true });
 			compressor = new Cola.Compressor({ is_js : isjs.checked });
@@ -149,7 +213,7 @@ main();</textarea>
 			try {
 				// 1. compile
 				ast = Cola.parse(source, { is_js : isjs.checked });
-				if(!isjs.checked) ast = ast.toJavaScript({ main_binding : false });
+				if(!isjs.checked) ast = ast.toJavaScript({ main_binding : mainbinding.checked });
 				ast.print(stream);
 				translationArea.value = stream.toString();
 
@@ -176,13 +240,9 @@ main();</textarea>
 		}
 
         function benchmark(){
-            console.time("Uncompressed");
-            eval(translationArea.result);
-            console.timeEnd("Uncompressed");
-
-            console.time("Compressed");
+            console.time("ColaScript");
             eval(resultArea.result);
-            console.timeEnd("Compressed");
+            console.timeEnd("ColaScript");
         }
 
 		function exec(){
diff --git a/lib/parse.js b/lib/parse.js
index 6af8f6a3..546abbb5 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -469,7 +469,7 @@ Cola.Tokenizer.prototype.read_string = Cola.Tokenizer.with_eof_error("Unterminat
         } else 
 
         this.S.string.at[this.S.string.level].quote = quote;
-        if (this.peek() == '@' || this.peek() == '{' && this.peek(1) == '{') return this.token("string", "");
+        if (this.peek() == '@' || this.peek() == '{' && this.peek(1) == '{') return this.token("string", ret);
     }
 
     for (;;) {
@@ -1432,7 +1432,7 @@ Cola.Parser.prototype.new_ = function() {
     var newexp = this.expr_atom(false), args;
     if (this.is("punc", "(")) {
         this.next();
-        args = this.expr_list(")");
+        args = this.expr_list(")", false, false, !this.is_js);
     } else {
         args = [];
     }
diff --git a/lib/std.js b/lib/std.js
index f772955b..8497460b 100644
--- a/lib/std.js
+++ b/lib/std.js
@@ -111,7 +111,7 @@ Cola.$_cola_array_range.i = 7;
 
 Cola.$_cola_array_asplice = function $_cola_array_asplice(_array, _from, _to, _a){
     _to = _to - _from + 1; 
-    return [].splice.apply(_array, [_from, _to + 1].concat(_a)), _a;
+    return [].splice.apply(_array, [_from, _to].concat(_a)), _a;
 }
 Cola.$_cola_array_asplice.i = 8;