diff --git a/js/quicksort.js b/js/quicksort.js
index 0338c06..ff40814 100644
--- a/js/quicksort.js
+++ b/js/quicksort.js
@@ -35,10 +35,10 @@ QuickSort.prototype.sort = function(arr, start, end) {
 
     this//.instruct('initSection', left, right)
         .instruct('showMarker', 0, 1)
-        .instruct('marker', 100, 1, left, 'L')
+        .instruct('marker', 0, 1, left, 'L')
         .instruct('message', 0, 3, 'Left: ' + left)
         .instruct('showMarker', 0, 2)
-        .instruct('marker', 100, 2, right, 'R')
+        .instruct('marker', 0, 2, right, 'R')
         .instruct('message', 0, 4, 'Right: ' + right)
         .instruct('unhighlight')
         .instruct('highlight', 100, pivot)
diff --git a/js/visualizer-actions.js b/js/visualizer-actions.js
index e42f83a..6aa902d 100644
--- a/js/visualizer-actions.js
+++ b/js/visualizer-actions.js
@@ -48,9 +48,10 @@ Visualizer.prototype.unhighlight = function() {
 };
 
 // TODO restart instructions on re-init
-// TODO on 'next step', skip past all zero-length timeouts -> do this in followInstruction by checking if timeout is zero
-// TODO add adaptive/stable bools below canvas
 // TODO add tabs for best/worst cases
+// TODO add links to stats
+// TODO fade unfade
+// TODO try to pass reference instead of string, use apply() or call()?
 
 // /**
 //  * Greys out an item.
@@ -99,6 +100,7 @@ Visualizer.prototype.showMarker = function(args) {
  * Marker movement.
  */
 Visualizer.prototype.marker = function(args) {
+    var delay = args[1];
     var which = args[2];
     var index = args[3];
     var label = args[4];
@@ -109,7 +111,7 @@ Visualizer.prototype.marker = function(args) {
     }
 
     this.svg.select(`#marker${which}`)
-        .transition().duration(100)
+        .transition().duration(delay)
         .attr('transform', `translate(${Visualizer.calculateX(index)},${Visualizer.spacerW})`)
 };
 
diff --git a/js/visualizer.js b/js/visualizer.js
index 6e22448..f9a1908 100644
--- a/js/visualizer.js
+++ b/js/visualizer.js
@@ -90,7 +90,11 @@ Visualizer.prototype.followInstruction = function() {
     if (typeof operation === 'function') {
         operation.call(this, instruction);
 
-        if (this.paused === false) {
+        if (delay === 0) {
+            this.instructionIndex++;
+            this.followInstruction();
+        }
+        else if (this.paused === false) {
             this.instructionIndex++;
             setTimeout(this.followInstruction.bind(this), delay);
         }