diff --git a/index.html b/index.html
index 95a5480..45e21e7 100644
--- a/index.html
+++ b/index.html
@@ -3,7 +3,7 @@
 <head>
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width,initial-scale=1.0">
-<title>Electrons on a sphere - atomic.garden</title>
+<title>p5.js</title>
 <script src="lib/p5.js"></script>
 <style>
 :root {
@@ -104,7 +104,7 @@ aside > container > div {
 <noscript>
 This page requires JavaScript.
 <br>
-Source code: <a href="https://git.atomic.garden/root/sphere-electrons">https://git.atomic.garden/root/sphere-electrons</a>
+Source code: <a href="https://git.atomic.garden/root/sphere-charges">https://git.atomic.garden/root/sphere-charges</a>
 </noscript>
 <script src="thomson-problem.js"></script>
 <script src="sketch.js"></script>
diff --git a/thomson-problem.js b/thomson-problem.js
index bb7466c..8b8245c 100644
--- a/thomson-problem.js
+++ b/thomson-problem.js
@@ -1,5 +1,5 @@
 function move_charges(charges) {
-  for (let charge of charges) {
+  for (charge of charges) {
     charge.acceleration.setMag(0);
   }
   for (let i = 0; i < charges.length; i += 1) {
@@ -23,7 +23,8 @@ function move_charges(charges) {
       charges[j].acceleration.add(aj);
     }
   }
-  for (let charge of charges) {
+  for (let i = 0; i < charges.length; i += 1) {
+    let charge = charges[i];
     charge.velocity = charge.velocity.add(charge.acceleration);
     charge.position = charge.position.add(charge.velocity);
     charge.position.normalize();
