From b13831edc0a45148385fc1c0356f67f031ef7401 Mon Sep 17 00:00:00 2001
From: jbphet <john.blanco@colorado.edu>
Date: Tue, 3 Nov 2015 08:56:34 -0700
Subject: [PATCH] Added fire on hold to StepBackButton, see
 https://github.com/phetsims/sun/issues/203

---
 js/buttons/StepBackButton.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/js/buttons/StepBackButton.js b/js/buttons/StepBackButton.js
index a795c64ba..7f331910a 100644
--- a/js/buttons/StepBackButton.js
+++ b/js/buttons/StepBackButton.js
@@ -36,7 +36,8 @@ define( function( require ) {
   function StepBackButton( stepFunction, playProperty, options ) {
     var stepBackButton = this;
     options = _.extend( {
-      radius: DEFAULT_RADIUS
+      radius: DEFAULT_RADIUS,
+      fireOnHold: true
     }, options );
 
     // step symbol is sized relative to the radius