Deliverable_2.md

@@ -16,6 +16,10 @@ As May, I want to curate all my friends songs together so that I can listen to t
 
 ![Use_case_diagram_1_](uploads/74d0fe2681b3c2af6242acf980440e19/Use_case_diagram_1_.png)
 
+As SleepySam, I want set a sleep timer duration (e.g., 15, 30, 60 minutes) so that the music stops playing after the selected time.
+
+![UsecaseDiagram](uploads/fd528dd5199c39c7e37c32322a5799bd/UsecaseDiagram.png)
+
 **2. Uml class diagram(team)**
 
 ![Class_diagram_-_Page_1](uploads/3a98eddb2fde83cde085f2254d16d07f/Class_diagram_-_Page_1.png){width=1422 height=1743}