Add the last two elements, append them.

Codecademy.md

@@ -355,6 +355,26 @@ elif len(lst) % 2 == 0:
 print(middle_element([5, 2, -10, -4, 4, 5, 7]))
 ```
 
+### Add the last two elements, append them. (Ex.8)
+
+   ```
+   def append_sum(lst):
+  trip = 0
+
+  while trip < 3:
+    lasttwo = lst[-2:]
+    added = lasttwo[0] + lasttwo[1]
+    print(added)
+    lst.append(added)
+
+    trip = trip + 1
+
+  return lst
+
+#Uncomment the line below when your function is done
+print(append_sum([1, 1, 2]))
+```
+
 ### Sublists
 
 Grab a subset of a list using `sublist = letters[1:6]` This would give you index **1-5**.