diff --git a/scripts/Picker.js b/scripts/Picker.js
new file mode 100644
index 0000000..d07f8da
--- /dev/null
+++ b/scripts/Picker.js
@@ -0,0 +1,144 @@
+// Picker dialog
+var Picker = (function(picker) {
+  'use strict';
+  
+  picker.settings = {
+    height:520,
+    width:600,
+    title:"Select a folder, or file to replace",
+    defaultSVGName:"sankeysnip.svg",
+    mime:"image/svg+xml",
+    mimeFolder:"application/vnd.google-apps.folder"
+  };
+  
+  var token_,
+    key_,
+    name_=picker.settings.defaultSVGName;
+  
+  /**
+  * set the access token
+  * @param {string} token the oauth token
+  * @return {Picker} self
+  */
+  picker.setToken = function (token) {
+    token_ = token;
+    return picker;
+  };
+  
+  /**
+  * set the developer key
+  * @param {string} key the developer key
+  * @return {Picker} self
+  */
+  picker.setKey = function (key) {
+    key_ = key;
+    return picker;
+  };
+  
+ /**
+  * set the filename
+  * @param {string} key the developer key
+  * @return {Picker} self
+  */
+  picker.setName = function (name) {
+    name_ = name;
+    return picker;
+  };
+  
+  /**
+   * open a picker dialog
+   * @param {string} content the content to write
+   * @param {function} success what to do when done.
+   * @param {function} failure what do to on failure
+   */
+  picker.writeContent = function (content, success, failure) {
+  
+  
+   var docsView = new google.picker.DocsView()
+          .setIncludeFolders(true) 
+          .setMimeTypes(picker.settings.mime)
+          .setSelectFolderEnabled(true)
+          .setOwnedByMe(true)
+          .setMode(google.picker.DocsViewMode.GRID);
+
+
+    var googlePicker = new google.picker.PickerBuilder()
+      .addView(docsView)
+      .setOAuthToken(token_)
+      .setDeveloperKey(key_)
+      .setTitle(picker.settings.title)
+      .setSize(picker.settings.width *.9,picker.settings.height*.9)
+      .setCallback( function (pickResult) {
+      
+        if (pickResult[google.picker.Response.ACTION] === google.picker.Action.PICKED){
+          var doc = pickResult[google.picker.Response.DOCUMENTS][0];
+          var id = doc[google.picker.Document.ID];
+          var url = doc[google.picker.Document.URL];
+          var title = doc[google.picker.Document.NAME];
+          var mime = doc[google.picker.Document.MIME_TYPE];
+          var parentId = doc[google.picker.Document.PARENT_ID];
+          
+          // now we have the folder, write the content using the drive API
+          gapi.client.load('drive', 'v2').then(function() {
+          
+            // use the token inherited from Apps Script
+            gapi.auth.setToken({
+              access_token: token_
+            });
+            
+            if (mime === picker.settings.mimeFolder) {
+              // writing a new file to a folder
+              return prepareFileAndContent (content,id).then (success, failure);
+            }
+            else {
+              // replacing the contents of an existing file
+              return prepareFileAndContent (content,parentId,id).then (success, failure);
+            }
+
+          });
+        }
+      })  
+      .setOrigin('https://docs.google.com')
+      .build();
+      
+    googlePicker.setVisible(true);
+  };
+  
+  
+  function prepareFileAndContent (content,folderId,fileId) {
+  
+    const boundary = '-------314159265358979323846';
+    const delimiter = "\r\n--" + boundary + "\r\n";
+    const close_delim = "\r\n--" + boundary + "--";
+    
+   
+    var resource = {
+      'title': name_,
+      'parents':[{id:folderId}],
+      'mimeType':picker.settings.mime,
+      'description':'Created by sankey snip (http://ramblings.mcpher.com/Home/excelquirks/addons/sankeyaddon) on ' + new Date().toString()
+    };
+    
+    
+    var multipartRequestBody =
+        delimiter +  
+        'Content-Type: application/json\r\n\r\n' +
+        JSON.stringify(resource) +
+        delimiter + 
+        'Content-Type: ' + 
+        picker.settings.mime + '\r\n' + '\r\n' +
+        content +
+        close_delim;
+   
+    return gapi.client.request({
+        'path': '/upload/drive/v2/files'+ (fileId ? '/' + fileId : ''  ) + '?uploadType=multipart',
+        'method': fileId ? 'PUT': 'POST',
+        'headers': {'Content-Type': 'multipart/mixed; boundary="' + boundary + '"'},
+        'body': multipartRequestBody
+    });
+    
+  }
+
+  return picker;
+  
+})(Picker || {});