From aa0476c1da35a95a54ed52b9adb918c9813187a0 Mon Sep 17 00:00:00 2001
From: Nicole Parrot <cleoqc1124@gmail.com>
Date: Sun, 1 Dec 2019 23:15:02 -0500
Subject: [PATCH] Docs: Change default value in Javascript. (#2540)

* Change default value in Javascript.

Per @microbit-mark 's suggestion, add an example of how to change the default interval value by switching to Javascript.

* edits to new example
---
 docs/reference/basic/show-icon.md | 36 +++++++++++++++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/docs/reference/basic/show-icon.md b/docs/reference/basic/show-icon.md
index d76264b2..d3b7451d 100644
--- a/docs/reference/basic/show-icon.md
+++ b/docs/reference/basic/show-icon.md
@@ -9,7 +9,7 @@ basic.showIcon(IconNames.Heart)
 ## Parameters
 
 * ``icon``, the identifier of the icon to display
-* ``interval`` (optional), the time to display in milliseconds. default is 400.
+* ``interval`` (optional), the time to display in milliseconds. default is 600.
 
 ## Example
 
@@ -21,6 +21,38 @@ basic.pause(1000)
 basic.showIcon(IconNames.Sad)
 ```
 
+## Beating Heart
+
+You can create a beating heart by using the forever block as follows:
+
+```blocks
+basic.forever(function () {
+    basic.showIcon(IconNames.Heart)
+    basic.showIcon(IconNames.SmallHeart)
+})
+```
+
+## Fast Beating Heart
+
+You could slow down the previous animation by inserting a pause block:
+
+```block
+basic.pause(1000)
+```
+
+...but how would you speed it up?
+
+You can change the default pause value, which is set in the ``interval`` parameter, to be smaller than `600` by changing it in the JavaScript editor.
+
+This JavaScript code creates a crazy fast heart beat! Did you know that a hamster's heart beats at a rate this fast? 
+
+```typescript
+basic.forever(function () {
+    basic.showIcon(IconNames.Heart, 60)
+    basic.showIcon(IconNames.SmallHeart, 60)
+})
+```
+
 ## See also
 
-[showLeds](/reference/basic/show-leds)
\ No newline at end of file
+[showLeds](/reference/basic/show-leds)