diff --git a/hidepage.js b/hidepage.js
index 09ce01b..29bea70 100644
--- a/hidepage.js
+++ b/hidepage.js
@@ -16,9 +16,11 @@ function hide_actually_everything() {
   hidden.style.display = 'none';
 }
 
+// get the elements we need to hide
 var shown  = document.getElementById("page-content");
 var hidden = document.getElementById("page-content-hidden");
 
+// assign functions to buttons
 document
   .getElementById("button-hide-page")
   .addEventListener("click", hide_page);
@@ -28,3 +30,10 @@ document
 document
   .getElementById("button-hide-everything")
   .addEventListener("click", hide_actually_everything);
+
+// check URL params and see if we should hideall
+const urlParams = new URLSearchParams(window.location.search);
+if (urlParams.has('hideall')) {
+  hide_page();
+  hide_actually_everything();
+}
diff --git a/walkers.js b/walkers.js
index 4401cdb..fe1641f 100644
--- a/walkers.js
+++ b/walkers.js
@@ -95,8 +95,14 @@ function random_update_time() {
 function init_walk() {
   setInterval(update_trails, 200);
 
+  // read URL parameters to see if we should create a default number,
+  // otherwise default to walker_colors.length
+  const urlParams = new URLSearchParams(window.location.search);
+  console.log(urlParams.get('n'));
+  const n_create = Number(urlParams.get('n')) || walker_colors.length;
+
   // create initial walkers of every color
-  for (var i = 0; i < walker_colors.length; i++) {
+  for (var i = 0; i < n_create; i++) {
     create_random_walker();
   }
 }
@@ -260,3 +266,4 @@ var walkers = [];
 var walker_timers = [];
 var trails = []
 init_walk();
+