diff --git a/flutter/lib/curve_painter.dart b/flutter/lib/curve_painter.dart
index 3959893..9eb30ac 100644
--- a/flutter/lib/curve_painter.dart
+++ b/flutter/lib/curve_painter.dart
@@ -3,17 +3,18 @@ import 'package:flutter/material.dart';
 import 'dart:math';
 
 class CurvePainter extends CustomPainter {
-  CurvePainter(Graphs gr) {
-    _gr = gr;
-  }
+  CurvePainter({
+    Key? key,
+    required this.gr,
+  });
 
-  Graphs _gr = Graphs();
-  double rad = 7;
-  double width = 4;
-  Color col = Colors.black;
-  double aboveHeight = 5;
+  Graphs gr;
+  final double rad = 7;
+  final double width = 4;
+  final Color col = Colors.black;
+  final double aboveHeight = 5;
   double circleRad = 100;
-  TextStyle textStyle = const TextStyle(
+  final TextStyle textStyle = const TextStyle(
     color: Colors.black,
     fontSize: 21,
   );
@@ -91,13 +92,14 @@ class CurvePainter extends CustomPainter {
     //drawLine(canvas, Offset(0, size.height / 2),
     //Offset(size.width, size.height / 2));
 
-    _gr = getGraph();
-    var off = getDotPos(_gr.getDotAmount(), size);
+    //gr = getGraph();
+    var off = getDotPos(gr.getDotAmount(), size);
     for (int i = 0; i < off.length; i++) {
       drawDot(canvas, off[i + 1]!);
-      drawAboveText(canvas, off[i + 1]!, _gr.getDots()[i].getName());
+      drawAboveText(
+          canvas, off[i + 1]!, "${gr.getDots()[i].getName()}:[${i + 1}]");
     }
-    drawConnections(canvas, _gr.getDots(), off);
+    drawConnections(canvas, gr.getDots(), off);
 
     paint.color = Colors.blue;
     paint.style = PaintingStyle.stroke;
@@ -109,7 +111,7 @@ class CurvePainter extends CustomPainter {
 
   @override
   bool shouldRepaint(CustomPainter oldDelegate) {
-    return false;
+    return true;
   }
 
   /*void _drawTextAt(String txt, Offset position, Canvas canvas) {
diff --git a/flutter/lib/pages/drawing_page.dart b/flutter/lib/pages/drawing_page.dart
index 952f05d..43edc78 100644
--- a/flutter/lib/pages/drawing_page.dart
+++ b/flutter/lib/pages/drawing_page.dart
@@ -1,11 +1,20 @@
 import 'dart:io';
-import 'dart:math';
 
 import 'package:graphs/curve_painter.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:graphs/src/graph.dart';
 
+Graphs getGraph() {
+  List<Dot> d = <Dot>[];
+  d.add(Dot.fromTwoLists("1", [2, 3], [1, 1]));
+  d.add(Dot.fromTwoLists("2", [1, 3], [1, 1]));
+  d.add(Dot.fromTwoLists("3", [1, 2], [1, 1]));
+  d.add(Dot.fromTwoLists("Name1", [], []));
+  d.add(Dot.fromTwoLists("Name2", [], []));
+  return Graphs.fromList("1", d, false, false);
+}
+
 class DrawingPage extends StatefulWidget {
   const DrawingPage({Key? key}) : super(key: key);
 
@@ -15,11 +24,18 @@ class DrawingPage extends StatefulWidget {
 
 class _DrawingPageState extends State<DrawingPage> {
   double screenSize = 0;
-  Graphs data = Graphs("Data");
+  Graphs data = getGraph();
 
-  final _textDot1Controller = TextEditingController();
-  final _textDot2Controller = TextEditingController();
-  final _textLenController = TextEditingController();
+  final _textNameController = TextEditingController();
+  final _textInptController = TextEditingController();
+  final _textDistController = TextEditingController();
+  final _textLnthController = TextEditingController();
+  void clearTextControllers() {
+    _textDistController.clear();
+    _textInptController.clear();
+    _textLnthController.clear();
+    _textNameController.clear();
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -35,35 +51,44 @@ class _DrawingPageState extends State<DrawingPage> {
             child: Column(children: <Widget>[
               const SizedBox(height: 5),
               Row(children: [
-                addSpaceW(screenSize / 4 - 20),
-                createInputBox("Input dot1 number", screenSize / 4 - 5,
-                    Icons.fiber_manual_record, _textDot1Controller),
-                //addSpaceW(4),
-                createInputBox("Input dot2 number", screenSize / 4 - 5,
-                    Icons.fiber_manual_record, _textDot2Controller),
+                addSpaceW(screenSize / 8 - 20),
+                createButton("\nAdd dot\n", addDotPushed),
+                createInputBox("Dot name", screenSize / 4 - 25, Icons.label,
+                    _textNameController),
+                addSpaceW(20),
+                createButton("\nDel dot \n", delDotPushed),
+                createInputBox("Dot number", screenSize / 4 - 25,
+                    Icons.fiber_manual_record, _textInptController),
               ]),
               addSpaceH(3),
-              createInputBox("Input path length", screenSize / 3 + 30,
-                  Icons.arrow_right_alt_outlined, _textLenController),
+              Row(children: [
+                addSpaceW(screenSize / 4 - 20),
+                createInputBox("Destination number", screenSize / 4 - 5,
+                    Icons.fiber_manual_record, _textDistController),
+                //addSpaceW(4),
+                createInputBox("Input length", screenSize / 4 - 5,
+                    Icons.arrow_right_alt_outlined, _textLnthController),
+              ]),
+              //createInputBox("Input path length", screenSize / 3 + 30, Icons.arrow_right_alt_outlined, _textLenController),
             ]),
           ),
           actions: [
-            Column(
+            /*Column(
               children: [
                 addSpaceH(10),
                 createButton("\nAdd dot\n", addDotPushed),
                 addSpaceH(3),
                 createButton("\nDel dot \n", addLenPushed),
               ],
-            ),
+            ),*/
             IconButton(
-              onPressed: () => closeApp(),
-              icon: const Icon(Icons.close),
-              iconSize: 50,
+              onPressed: () => flushData(),
+              icon: const Icon(Icons.delete_sweep),
+              iconSize: 60,
             ),
           ]),
       body: CustomPaint(
-        painter: CurvePainter(Graphs()),
+        painter: CurvePainter(gr: data),
         child: const Center(),
       ),
     ));
@@ -116,17 +141,37 @@ class _DrawingPageState extends State<DrawingPage> {
   }
 
   void addDotPushed() {
-    showPopUp("Test", "Test message");
-    print(_textDot1Controller.text);
-    _textDot1Controller.clear();
+    //showPopUp("Test", "Test message");
+    //var inp = int.tryParse(_textNameController.text);
+    if (_textNameController.text == "") {
+      showPopUp("Error", "No name in \"Dot name\" box");
+    } else {
+      String? res = data.addIsolated(_textNameController.text);
+      if (res != null) {
+        showPopUp("Error", res);
+      }
+    }
+    //print(_textNameController.text);
+    clearTextControllers();
+  }
+
+  void delDotPushed() {
+    if (_textNameController.text == "") {
+      showPopUp("Error", "No name in \"Dot name\" box");
+    } else {
+      String? res = data.addIsolated(_textNameController.text);
+      if (res != null) {
+        showPopUp("Error", res);
+      }
+    }
+    clearTextControllers();
   }
 
   void addLenPushed() {
+    //data.delDot()
     print(
-        "${_textDot1Controller.text} -> ${_textDot2Controller.text} = ${_textLenController.text}");
-    _textDot1Controller.clear();
-    _textDot2Controller.clear();
-    _textLenController.clear();
+        "${_textInptController.text} -> ${_textDistController.text} = ${_textLnthController.text}");
+    clearTextControllers();
   }
 
   void showPopUp(String alertTitle, String err) => showDialog<String>(
@@ -143,10 +188,11 @@ class _DrawingPageState extends State<DrawingPage> {
         ),
       );
 
-  void closeApp() {
-    if (Platform.isWindows) {
+  void flushData() {
+    /*if (Platform.isWindows) {
       exit(0);
     }
-    SystemChannels.platform.invokeMethod('SystemNavigator.pop');
+    SystemChannels.platform.invokeMethod('SystemNavigator.pop');*/
+    data.flushData();
   }
 }
diff --git a/flutter/lib/src/graph.dart b/flutter/lib/src/graph.dart
index 74df1c3..cfcb8d2 100644
--- a/flutter/lib/src/graph.dart
+++ b/flutter/lib/src/graph.dart
@@ -97,11 +97,9 @@ class Graphs {
   bool _oriented = false; //Ориентированность
 
   //*********************Add************************
-  bool addDot(Dot a) {
+  String? addDot(Dot a) {
     if (getNumByName(a.getName()) != null) {
-      print(
-          "Dot name ${a.getName()} already in use. Change name or use addPath");
-      return false;
+      return ("Dot name \"${a.getName()}\" already in use. Change name or use addPath");
     }
     _amount++;
     a.num = _amount;
@@ -109,7 +107,7 @@ class Graphs {
     _syncNameTable();
     checkDots(false);
     if (!_oriented) _fullFix();
-    return true;
+    return null;
   }
 
   bool addDotFromToLists(String name, List<int> num0, List<int> length,
@@ -129,21 +127,21 @@ class Graphs {
     return true;
   }
 
-  bool addIsolated(String name) {
-    var o = addDot(Dot.fromTwoLists(name, [], []));
+  String? addIsolated(String name) {
+    var res = addDot(Dot.fromTwoLists(name, [], []));
     _syncNameTable();
-    return o;
+    return res;
   }
 
-  bool addPath(int from, int to, [int len = 0]) {
+  String? addPath(int from, int to, [int len = 0]) {
     if (from <= 0 || from > _amount || to <= 0 && to > _amount) {
-      return false;
+      return "Index out of range. Have dots 1..$_amount";
     }
     _dots[from - 1].addPath(to, len);
     if (!_oriented) {
       _dots[to - 1].addPath(from, len);
     }
-    return true;
+    return null;
   }
   //*********************Add************************
 
@@ -400,6 +398,12 @@ class Graphs {
     _syncNameTable();
   }
 
+  //***********Cleaning***********
+  void flushData() {
+    _dots = <Dot>[];
+  }
+  //***********Cleaning***********
+
   //************Алгоритмы************
   bool bfsHasPath(int startDot, int goalDot) {
     // обход в ширину