diff --git a/helper.js b/helper.js
new file mode 100644
index 0000000..ce2bbcc
--- /dev/null
+++ b/helper.js
@@ -0,0 +1,41 @@
+const cherio = require('cherio');
+const path = require('path');
+const fs = require('fs-extra');
+const fsp = fs.promises;
+const mkdirp = require('util').promisify(fs.mkdirp);
+const urllib = require('url');
+
+async function* save(url,savedir) {
+ console.log({url});
+ var urlProperties = new URL(url);
+ var resp = await fetch(url);
+ var text = await resp.text();
+ var relativeSavePath = path.join.apply(null,urlProperties.pathname.split('/'));
+ if(relativeSavePath==='.') relativeSavePath = 'index.html'; //Catch root document
+ console.log({relativeSavePath});
+ var savepath = path.join(savedir,relativeSavePath);
+ await mkdirp(path.dirname(savepath));
+ console.log('Saving',url,savepath);
+ await fsp.writeFile(savepath,text);
+ var dom = cherio(text);
+ var linkElements = dom.find('a');
+ for(var link of linkElements.toArray()) {
+  var testurl = cherio(link).attr('href'); //Get href
+  if(!testurl) continue; //Ignore empty
+  testurl = urllib.resolve(url,testurl); //Handle relative urls
+  var testProperties = new URL(testurl); //Reject beyond the current domain
+  if(testProperties.host != urlProperties.host) continue;
+  yield testurl;
+ }
+}
+
+module.exports = main;
+async function main(rooturl,savedir,downloaded=[],todownload=[]) {
+ todownload.push(rooturl);
+ while(todownload.length) {
+  var saveurl = todownload.shift();
+  for await (var newUrl of save(saveurl,savedir)) {
+   if(!todownload.includes(newUrl) && !downloaded.includes(newUrl)) todownload.push(newUrl);
+  }
+ }
+}
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