diff --git a/.idea/frontend.iml b/.idea/frontend.iml
new file mode 100644
index 0000000..24643cc
--- /dev/null
+++ b/.idea/frontend.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.tmp" />
+      <excludeFolder url="file://$MODULE_DIR$/temp" />
+      <excludeFolder url="file://$MODULE_DIR$/tmp" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..f3d93d7
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/frontend.iml" filepath="$PROJECT_DIR$/.idea/frontend.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 369b867..4540371 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,27 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
   <component name="ChangeListManager">
     <list default="true" id="3c7078e7-6f30-4d92-9696-11496f9e6dff" name="Changes" comment="">
-      <change beforePath="$PROJECT_DIR$/nanomap/.idea/.gitignore" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/.idea/jsLibraryMappings.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/.idea/modules.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/.idea/nanomap.iml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/.idea/vcs.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/.gitignore" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/README.md" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/package-lock.json" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/package.json" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/public/favicon.ico" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/public/index.html" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/App.css" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/App.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/App.test.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/Networking.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/SimulateClick.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/UMap.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/index.css" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/index.js" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/nanomap/nanomap/src/logo.svg" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/public/index.html" beforeDir="false" afterPath="$PROJECT_DIR$/public/index.html" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/App.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/App.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/Networking.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/Networking.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/SimulateClick.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/SimulateClick.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/UMap.js" beforeDir="false" afterPath="$PROJECT_DIR$/src/UMap.js" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -34,29 +23,29 @@
   <component name="MarkdownSettingsMigration">
     <option name="stateVersion" value="1" />
   </component>
-  <component name="ProjectColorInfo"><![CDATA[{
-  "associatedIndex": 3
-}]]></component>
+  <component name="ProjectColorInfo">{
+  &quot;associatedIndex&quot;: 3
+}</component>
   <component name="ProjectId" id="2Yc9rUDmr9wvYpz7Xdq1eJVJoJy" />
   <component name="ProjectViewState">
     <option name="hideEmptyMiddlePackages" value="true" />
     <option name="showLibraryContents" value="true" />
   </component>
-  <component name="PropertiesComponent"><![CDATA[{
-  "keyToString": {
-    "RunOnceActivity.OpenProjectViewOnStart": "true",
-    "RunOnceActivity.ShowReadmeOnStart": "true",
-    "WebServerToolWindowFactoryState": "false",
-    "git-widget-placeholder": "dev",
-    "last_opened_file_path": "/home/user/Documents/fd_data-structures/pj/nanomap-frontend",
-    "node.js.detected.package.eslint": "true",
-    "node.js.detected.package.tslint": "true",
-    "node.js.selected.package.eslint": "(autodetect)",
-    "node.js.selected.package.tslint": "(autodetect)",
-    "nodejs_package_manager_path": "npm",
-    "vue.rearranger.settings.migration": "true"
+  <component name="PropertiesComponent">{
+  &quot;keyToString&quot;: {
+    &quot;RunOnceActivity.OpenProjectViewOnStart&quot;: &quot;true&quot;,
+    &quot;RunOnceActivity.ShowReadmeOnStart&quot;: &quot;true&quot;,
+    &quot;WebServerToolWindowFactoryState&quot;: &quot;false&quot;,
+    &quot;git-widget-placeholder&quot;: &quot;dev&quot;,
+    &quot;last_opened_file_path&quot;: &quot;/home/user/Documents/fd_data-structures/pj/frontend&quot;,
+    &quot;node.js.detected.package.eslint&quot;: &quot;true&quot;,
+    &quot;node.js.detected.package.tslint&quot;: &quot;true&quot;,
+    &quot;node.js.selected.package.eslint&quot;: &quot;(autodetect)&quot;,
+    &quot;node.js.selected.package.tslint&quot;: &quot;(autodetect)&quot;,
+    &quot;nodejs_package_manager_path&quot;: &quot;npm&quot;,
+    &quot;vue.rearranger.settings.migration&quot;: &quot;true&quot;
   }
-}]]></component>
+}</component>
   <component name="RunManager">
     <configuration name="start" type="js.build_tools.npm" temporary="true" nameIsGenerated="true">
       <package-json value="$PROJECT_DIR$/package.json" />
@@ -83,6 +72,8 @@
       <option name="presentableId" value="Default" />
       <updated>1700814200305</updated>
       <workItem from="1700814201341" duration="315000" />
+      <workItem from="1700814808669" duration="47000" />
+      <workItem from="1700822693197" duration="4588000" />
     </task>
     <servers />
   </component>
diff --git a/misc/icon.jpeg b/misc/icon.jpeg
new file mode 100644
index 0000000..75eacf5
Binary files /dev/null and b/misc/icon.jpeg differ
diff --git a/public/icon.jpeg b/public/icon.jpeg
new file mode 100644
index 0000000..c57c9e6
Binary files /dev/null and b/public/icon.jpeg differ
diff --git a/public/index.html b/public/index.html
index 4bc3b88..f966501 100644
--- a/public/index.html
+++ b/public/index.html
@@ -6,7 +6,7 @@
     <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
           integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
           crossorigin=""/>
-    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/icon.jpeg">
     <!--
       Notice the use of %PUBLIC_URL% in the tag above.
       It will be replaced with the URL of the `public` folder during the build.
@@ -16,7 +16,7 @@
       work correctly both with client-side routing and a non-root public URL.
       Learn how to configure a non-root public URL by running `npm run build`.
     -->
-    <title>React App</title>
+    <title>nanoMap</title>
   </head>
   <body>
     <div id="root"></div>
diff --git a/src/App.js b/src/App.js
index 53f3338..49550e5 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,18 +1,110 @@
-import React, { Component } from 'react';
-import logo from './logo.svg';
+import React, {Component, useState} from 'react';
+import {Transition} from 'react-transition-group';
 import './App.css';
 import UMap from "./UMap";
+import {
+    Alert,
+    Box,
+    CircularProgress,
+    DialogContent,
+    DialogTitle,
+    Modal,
+    ModalDialog,
+    Sheet,
+    Typography
+} from "@mui/joy";
+import {WebhookOutlined} from "@mui/icons-material";
+import {post} from "./Networking";
 
-class App extends Component {
-  render() {
+export default function App() {
+    const [featureOpen, setFeatureOpen] = useState(true);
+    const [version, setVersion] = useState('');
+    const [intro, setIntro] = useState('');
+    const hs=setInterval(()=>{
+            post('handshake', []).then((response)=>{
+                const [version,intro]=response.split('@@');
+                setVersion(version);
+                setIntro(intro);
+                clearInterval(hs);
+            }).catch((e)=> {
+                console.error(e);
+                setVersion('');
+            });
+    }, 1000);
     return (
-      <div className="App">
-          <div style={{display: 'flex', justifyContent: 'center', alignItems: 'center'}}>
-              <UMap/>
-          </div>
-      </div>
+        <div className="App" style={{pointerEvents: version !== '' ? 'all' : 'none'}}>
+            <div style={{display: 'flex', justifyContent: 'center', alignItems: 'center'}}>
+                <UMap/>
+                <Transition in={featureOpen} timeout={400}>
+                    {(state) => (
+                        <Modal style={{pointerEvents: version !== '' ? 'all' : 'none'}}
+                               keepMounted
+                               open={!['exited', 'exiting'].includes(state)}
+                               onClose={() => setFeatureOpen(false)}
+                               slotProps={{
+                                   backdrop: {
+                                       sx: {
+                                           opacity: 0,
+                                           backdropFilter: 'none',
+                                           transition: `opacity 400ms, backdrop-filter 400ms`,
+                                           ...{
+                                               entering: {opacity: 1, backdropFilter: 'blur(8px)'},
+                                               entered: {opacity: 1, backdropFilter: 'blur(8px)'},
+                                           }[state],
+                                       },
+                                   },
+                               }}
+                               sx={{
+                                   visibility: state === 'exited' ? 'hidden' : 'visible',
+                                   zIndex: 'tooltip'
+                               }}
+                        >
+                            <ModalDialog
+                                sx={{
+                                    opacity: 0,
+                                    transition: `opacity 300ms`,
+                                    ...{
+                                        entering: {opacity: 1},
+                                        entered: {opacity: 1},
+                                    }[state],
+                                }}
+                            >
+                                <Alert style={{display: version!==''?'none':'flex'}}
+                                    variant="soft"
+                                    color="warning"
+                                    invertedColors
+                                    startDecorator={
+                                        <CircularProgress size="lg" color="warning">
+                                            <WebhookOutlined/>
+                                        </CircularProgress>
+                                    }
+                                    sx={{alignItems: 'flex-start', gap: '1rem'}}
+                                >
+                                    <Box sx={{flex: 1}}>
+                                        <Typography level="title-lg">Still connecting...</Typography>
+                                        <Typography level="body-md">
+                                            nanoMap requires a valid backend to work. If it takes too long, please check
+                                            your connection or see our status page.
+                                        </Typography>
+                                    </Box>
+                                </Alert>
+                                <Sheet style={{display: version !== '' ? 'flex' : 'none'}}>
+                                    <img src={'icon.jpeg'}
+                                         style={{height: '150px', display: 'flex', margin: 'auto', borderRadius: '50%'}}
+                                         alt={'nanoMap'}/>
+                                </Sheet>
+                                <DialogTitle style={{display: version !== '' ? 'flex' : 'none'}}
+                                             sx={{margin: 'auto', fontSize: '200%'}}>What's new in
+                                    nanoMap {version}</DialogTitle>
+                                <DialogContent style={{display: version !== '' ? 'flex' : 'none'}}
+                                               sx={{margin: 'auto'}}>
+                                    <div dangerouslySetInnerHTML={{ __html: intro }} />
+                                </DialogContent>
+                            </ModalDialog>
+                        </Modal>
+                    )}
+                </Transition>
+            </div>
+        </div>
     );
-  }
 }
-
-export default App;
diff --git a/src/Networking.js b/src/Networking.js
index 6fc6802..c0c48e3 100644
--- a/src/Networking.js
+++ b/src/Networking.js
@@ -13,4 +13,4 @@ export function post(method,args) {
         return response_data;
     };
     return ft();
-};
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/src/SimulateClick.js b/src/SimulateClick.js
index 21e2724..1674acd 100644
--- a/src/SimulateClick.js
+++ b/src/SimulateClick.js
@@ -1,12 +1,12 @@
 import {Button, IconButton, ButtonGroup, Menu, MenuItem, Stack} from "@mui/joy";
 import ArrowDropDownIcon from '@mui/icons-material/ArrowDropDown';
 import React from "react";
+import {Add} from "@mui/icons-material";
 
 export default function SimulateClick() {
     return (
         <ButtonGroup buttonFlex={1} aria-label="flex button group" sx={{zIndex: 'modal'}}>
-            <Button variant={'solid'} color={'success'}>Starting</Button>
-            <Button variant={'solid'} color={'primary'}>Destination</Button>
+            <Button variant={'solid'} color={'primary'} startDecorator={<Add />}>Add</Button>
         </ButtonGroup>
     );
 }
\ No newline at end of file
diff --git a/src/UMap.js b/src/UMap.js
index 8db9dc6..f7a3544 100644
--- a/src/UMap.js
+++ b/src/UMap.js
@@ -1,4 +1,5 @@
 import React, {Component, useEffect, useRef, useState} from 'react';
+import * as L from 'leaflet';
 import SearchIcon from '@mui/icons-material/Search';
 import {MapContainer, TileLayer, Marker, Popup, useMap} from 'react-leaflet';
 import {useMapEvents} from 'react-leaflet/hooks';
@@ -7,7 +8,6 @@ import {Autocomplete, CircularProgress, Sheet} from "@mui/joy";
 import SimulateClick from "./SimulateClick";
 
 const AppleParkLoc=[37.334835049999995,-122.01139165956805];
-
 class Markers extends Component {
     constructor(props) {
         super(props);
@@ -16,12 +16,10 @@ class Markers extends Component {
 
     render() {
         const mks=this.state.markers.map((p, i) => (
-            <Marker position={[p[0], p[1]]} opacity={1.0}><Popup>Generated
-                by <code>Markers()</code></Popup></Marker>
+            <Marker interactive={false} position={[p[0], p[1]]} opacity={1.0} />
         ));
         const cmks=this.state.candMarkers.map((p, i) => (
-            <Marker interactive={false} position={[p[0], p[1]]} opacity={0.5}><Popup>Generated
-                by <code>Markers()</code></Popup></Marker>
+            <Marker interactive={false} position={[p[0], p[1]]} opacity={0.5} />
         ));
         return mks.concat(cmks);
     }
@@ -71,7 +69,10 @@ function MapClickHandler({mks}) {
             const lat = e.latlng.lat, lng = e.latlng.lng;
             console.info(`Clicking on ${lat} ${lng}`);
             mks.current.addMarker(lat, lng);
-            post('click', [lat, lng]);
+            post('click', [lat, lng]).catch((e)=>{
+                console.error(e);
+                location.reload();
+            });
         },
         // TODO
         locationfound: (location) => {