added scratch to bubble sort.

Author: dovisutu

contents/bubble_sort/bubble_sort.md

@@ -68,6 +68,10 @@ This means that we need to go through the vector $$\mathcal{O}(n^2)$$ times with
 [import:2-14, lang:"emojicode"](code/emojicode/bubble_sort.emojic)
 {% sample lang="bash" %}
 [import:2-21, lang:"bash"](code/bash/bubble_sort.bash)
+{% sample lang="scratch" %}
+<p>
+  <img  class="center" src="/code/scratch/bubble_sort.svg" width="250" />
+</p>
 {% endmethod %}
 
 ... And that's it for the simplest bubble sort method.
@@ -141,6 +145,8 @@ Trust me, there are plenty of more complicated algorithms that do precisely the
 [import, lang:"emojicode"](code/emojicode/bubble_sort.emojic)
 {% sample lang="bash" %}
 [import, lang:"bash"](code/bash/bubble_sort.bash)
+{% sample lang="scratch"}
+The code snippet was taken from this [Scratch project](https://scratch.mit.edu/projects/316483792)
 {% endmethod %}
 
 <script>