Update app.py

app.py

@@ -1,3 +1,25 @@
 import streamlit as st
+import time
 
-st.markdown('Hello World')
+def main():
+    st.title("File Upload Example")
+
+    # File upload
+    uploaded_file = st.file_uploader("Upload a file", type=["txt", "csv"])
+
+    if uploaded_file is not None:
+        # Read file contents
+        file_contents = uploaded_file.read().decode("utf-8")
+
+        # Display file contents
+        st.markdown("### File Contents:")
+        st.markdown(file_contents)
+
+    # Wait for 5 seconds
+    time.sleep(5)
+
+    # Display completed message
+    st.write("Task completed!")
+
+if __name__ == "__main__":
+    main()