diff --git a/packages/backend/src/Connection.ts b/packages/backend/src/Connection.ts
index aa27f4e..0940434 100644
--- a/packages/backend/src/Connection.ts
+++ b/packages/backend/src/Connection.ts
@@ -118,6 +118,8 @@ class Connection {
       this.connections[id].receiveMsg(data)
 
       this.saveDoc(name)
+
+      this.garbageCursors(name)
     } catch (e) {
       console.log(e)
     }
diff --git a/packages/bridge/src/apply/annotation.ts b/packages/bridge/src/apply/annotation.ts
index e58bb85..dd7326a 100644
--- a/packages/bridge/src/apply/annotation.ts
+++ b/packages/bridge/src/apply/annotation.ts
@@ -1,4 +1,4 @@
-import { Operation, SyncDoc } from '../model'
+import { Operation, SyncDoc } from '../model/index'
 
 export const addAnnotation = (doc: SyncDoc, op: Operation): SyncDoc => {
   console.log('addAnnotation!!!', op.toJS())
diff --git a/packages/bridge/src/apply/index.ts b/packages/bridge/src/apply/index.ts
index c7d366c..2679830 100644
--- a/packages/bridge/src/apply/index.ts
+++ b/packages/bridge/src/apply/index.ts
@@ -21,7 +21,10 @@ export const applyOperation = (doc: SyncDoc, op: Operation): SyncDoc => {
   try {
     const applyOp = opType[op.type]
 
-    if (!applyOp) throw new TypeError('Unsupported operation type!')
+    if (!applyOp) {
+      console.log('operation', op.toJS())
+      throw new TypeError(`Unsupported operation type: ${op.type}!`)
+    }
 
     return applyOp(doc, op)
   } catch (e) {
diff --git a/packages/bridge/src/convert/index.ts b/packages/bridge/src/convert/index.ts
index f0bc7a3..782e14c 100644
--- a/packages/bridge/src/convert/index.ts
+++ b/packages/bridge/src/convert/index.ts
@@ -30,9 +30,7 @@ const toSlateOp = (ops: Automerge.Diff[], doc) => {
     []
   ])
 
-  const res = defer.flatMap(op => op(tempTree, doc)).filter(op => op)
-
-  return res
+  return defer.flatMap(op => op(tempTree, doc)).filter(op => op)
 }
 
 export { toSlateOp }
diff --git a/packages/bridge/src/cursor/index.ts b/packages/bridge/src/cursor/index.ts
index 480891e..c8d7087 100644
--- a/packages/bridge/src/cursor/index.ts
+++ b/packages/bridge/src/cursor/index.ts
@@ -1,5 +1,5 @@
 import { Operation, Selection } from 'slate'
-import { List } from 'immutable'
+import * as Immutable from 'immutable'
 import merge from 'lodash/merge'
 
 import { toJS } from '../utils'
@@ -51,7 +51,7 @@ export const removeCursor = (doc: SyncDoc, key: CursorKey) => {
   return doc
 }
 
-export const cursorOpFilter = (ops: List<Operation>, type: string) =>
+export const cursorOpFilter = (ops: Immutable.List<Operation>, type: string) =>
   ops.filter(op => {
     if (op.type === 'set_annotation') {
       return !(
diff --git a/packages/client/Cursor.tsx b/packages/client/Cursor.tsx
deleted file mode 100644
index e69de29..0000000
diff --git a/packages/client/src/Cursor.tsx b/packages/client/src/Cursor.tsx
new file mode 100644
index 0000000..3af7c45
--- /dev/null
+++ b/packages/client/src/Cursor.tsx
@@ -0,0 +1,47 @@
+import React, { Fragment } from 'react'
+
+const cursorStyleBase = {
+  position: 'absolute',
+  top: -2,
+  pointerEvents: 'none',
+  userSelect: 'none',
+  transform: 'translateY(-100%)',
+  fontSize: 10,
+  color: 'white',
+  background: 'palevioletred',
+  whiteSpace: 'nowrap'
+} as any
+
+const caretStyleBase = {
+  position: 'absolute',
+  top: 0,
+  pointerEvents: 'none',
+  userSelect: 'none',
+  height: '100%',
+  width: 2,
+  background: 'palevioletred'
+} as any
+
+const Cursor = ({ color, isBackward, name }) => {
+  const cursorStyles = {
+    ...cursorStyleBase,
+    background: color,
+    left: isBackward ? '0%' : '100%'
+  }
+  const caretStyles = {
+    ...caretStyleBase,
+    background: color,
+    left: isBackward ? '0%' : '100%'
+  }
+
+  return (
+    <Fragment>
+      <span contentEditable={false} style={cursorStyles}>
+        {name}
+      </span>
+      <span contentEditable={false} style={caretStyles} />
+    </Fragment>
+  )
+}
+
+export default Cursor
diff --git a/packages/client/src/index.ts b/packages/client/src/index.tsx
similarity index 70%
rename from packages/client/src/index.ts
rename to packages/client/src/index.tsx
index 112ea77..0623a68 100644
--- a/packages/client/src/index.ts
+++ b/packages/client/src/index.tsx
@@ -2,23 +2,18 @@ import onChange from './onChange'
 import renderEditor from './renderEditor'
 import renderAnnotation from './renderAnnotation'
 
+import renderCursor from './renderCursor'
+
 import { PluginOptions } from './model'
 
 export const defaultOpts = {
   url: 'http://localhost:9000',
   cursorAnnotationType: 'collaborative_selection',
+  renderCursor,
   annotationDataMixin: {
-    name: 'an collaborator'
-  },
-  renderCursor: data => data.name,
-  cursorStyle: {
-    background: 'palevioletred'
-  },
-  caretStyle: {
-    background: 'palevioletred'
-  },
-  selectionStyle: {
-    background: 'rgba(233, 30, 99, 0.2)'
+    name: 'an collaborator name',
+    color: 'palevioletred',
+    alphaColor: 'rgba(233, 30, 99, 0.2)'
   }
 }
 
diff --git a/packages/client/src/model.ts b/packages/client/src/model.ts
index 7edf145..ba98209 100644
--- a/packages/client/src/model.ts
+++ b/packages/client/src/model.ts
@@ -1,9 +1,12 @@
 import { ReactNode } from 'react'
-import CSS from 'csstype'
 import { Editor, Controller, Value } from 'slate'
 
 import Connection from './Connection'
 
+type Data = {
+  [key: string]: any
+}
+
 interface FixedController extends Controller {
   setValue: (value: Value) => void
 }
@@ -32,13 +35,9 @@ export interface PluginOptions {
   url?: string
   connectOpts?: SocketIOClient.ConnectOpts
   cursorAnnotationType?: string
-  caretStyle?: CSS.Properties
-  cursorStyle?: CSS.Properties
+  annotationDataMixin?: Data
   renderPreloader?: () => ReactNode
-  annotationDataMixin?: {
-    [key: string]: any
-  }
-  renderCursor?: (data: any) => ReactNode | string | any
+  renderCursor?: (data: Data) => ReactNode | any
   onConnect?: (connection: Connection) => void
   onDisconnect?: (connection: Connection) => void
 }
diff --git a/packages/client/src/renderAnnotation.tsx b/packages/client/src/renderAnnotation.tsx
index 5db7aa0..4114f0d 100644
--- a/packages/client/src/renderAnnotation.tsx
+++ b/packages/client/src/renderAnnotation.tsx
@@ -1,73 +1,28 @@
-import React, { Fragment } from 'react'
+import React from 'react'
 
-const wrapStyles = {
-  background: 'rgba(233, 30, 99, 0.2)',
-  position: 'relative'
-}
-
-const cursorStyleBase = {
-  position: 'absolute',
-  top: -2,
-  pointerEvents: 'none',
-  userSelect: 'none',
-  transform: 'translateY(-100%)',
-  fontSize: 10,
-  color: 'white',
-  background: 'palevioletred',
-  whiteSpace: 'nowrap'
-} as any
-
-const caretStyleBase = {
-  position: 'absolute',
-  top: 0,
-  pointerEvents: 'none',
-  userSelect: 'none',
-  height: '100%',
-  width: 2,
-  background: 'palevioletred'
-} as any
-
-const renderAnnotation = ({
-  cursorAnnotationType,
-  renderCursor,
-  cursorStyle = {},
-  caretStyle = {},
-  selectionStyle = {}
-}) => (props, editor, next) => {
+const renderAnnotation = ({ cursorAnnotationType, renderCursor }) => (
+  props,
+  editor,
+  next
+) => {
   const { children, annotation, attributes, node } = props
 
   if (annotation.type !== cursorAnnotationType) return next()
 
-  const isBackward = annotation.data.get('isBackward')
-  const targetPath = annotation.data.get('targetPath')
-  const cursorText = renderCursor(annotation.data)
-
-  const cursorStyles = {
-    ...cursorStyleBase,
-    ...cursorStyle,
-    left: isBackward ? '0%' : '100%'
-  }
-  const caretStyles = {
-    ...caretStyleBase,
-    ...caretStyle,
-    left: isBackward ? '0%' : '100%'
-  }
+  const data = annotation.data.toJS()
 
+  const { targetPath, alphaColor } = data
   const { document } = editor.value
 
   const targetNode = document.getNode(targetPath)
-  const isShowCursor = targetNode && targetNode.key === node.key
+  const showCursor = targetNode && targetNode.key === node.key
 
   return (
-    <span {...attributes} style={{ ...wrapStyles, ...selectionStyle }}>
-      {isShowCursor ? (
-        <Fragment>
-          <span contentEditable={false} style={cursorStyles}>
-            {cursorText}
-          </span>
-          <span contentEditable={false} style={caretStyles} />
-        </Fragment>
-      ) : null}
+    <span
+      {...attributes}
+      style={{ position: 'relative', background: alphaColor }}
+    >
+      {showCursor ? renderCursor(data) : null}
       {children}
     </span>
   )
diff --git a/packages/client/src/renderCursor.tsx b/packages/client/src/renderCursor.tsx
new file mode 100644
index 0000000..d70c4f4
--- /dev/null
+++ b/packages/client/src/renderCursor.tsx
@@ -0,0 +1,7 @@
+import React from 'react'
+
+import Cursor from './Cursor'
+
+const renderCursor = data => <Cursor {...data} />
+
+export default renderCursor
diff --git a/packages/example/package.json b/packages/example/package.json
index 60f837d..5a05cd2 100644
--- a/packages/example/package.json
+++ b/packages/example/package.json
@@ -16,6 +16,7 @@
     "concurrently": "^4.1.2",
     "faker": "^4.1.0",
     "lodash": "^4.17.15",
+    "nodemon": "^1.19.2",
     "randomcolor": "^0.5.4",
     "react": "^16.9.0",
     "react-dom": "^16.9.0",
@@ -26,10 +27,9 @@
   },
   "scripts": {
     "start": "react-scripts start",
+    "build": "react-scripts build",
     "dev": "concurrently \"yarn start\" \"yarn serve\"",
-    "serve": "nodemon --watch ../backend/lib --inspect server.js",
-    "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "serve": "nodemon --watch ../backend/lib --inspect server.js"
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -45,8 +45,5 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
-  },
-  "devDependencies": {
-    "nodemon": "^1.19.2"
   }
 }
diff --git a/packages/example/src/App.tsx b/packages/example/src/App.tsx
index c1fbd9f..64d00e1 100644
--- a/packages/example/src/App.tsx
+++ b/packages/example/src/App.tsx
@@ -19,9 +19,11 @@ class App extends Component<{}, { rooms: string[] }> {
 
     return (
       <Container>
-        <AddButton type="button" onClick={this.addRoom}>
-          Add Room
-        </AddButton>
+        <Panel>
+          <AddButton type="button" onClick={this.addRoom}>
+            Add Room
+          </AddButton>
+        </Panel>
         {rooms.map(room => (
           <Room key={room} slug={room} removeRoom={this.removeRoom(room)} />
         ))}
@@ -46,6 +48,10 @@ export default App
 
 const Container = styled.div``
 
+const Panel = styled.div`
+  display: flex;
+`
+
 const Button = styled.button`
   padding: 6px 14px;
   display: block;
diff --git a/packages/example/src/Client.tsx b/packages/example/src/Client.tsx
index 6c40d9c..21eaea2 100644
--- a/packages/example/src/Client.tsx
+++ b/packages/example/src/Client.tsx
@@ -45,18 +45,10 @@ class Client extends Component<ClienProps> {
         }
       },
       annotationDataMixin: {
-        name: this.props.name
+        name: this.props.name,
+        color,
+        alphaColor: color.slice(0, -2) + '0.2)'
       },
-      cursorStyle: {
-        background: color
-      },
-      caretStyle: {
-        background: color
-      },
-      selectionStyle: {
-        background: color.slice(0, -2) + '0.2)'
-      },
-      renderCursor: data => data.get('name'),
       // renderPreloader: () => <div>PRELOADER!!!!!!</div>,
       onConnect: this.onConnect,
       onDisconnect: this.onDisconnect