Update app.py

app.py

@@ -1,2 +1,23 @@
 import streamlit as st
-st.markdown('Hello World')
+import time
+
+def main():
+    st.title("File Upload and Display")
+
+    # File upload
+    uploaded_file = st.file_uploader("Upload a file")
+
+    if uploaded_file is not None:
+        # Display file contents using st.markdown()
+        file_contents = uploaded_file.read().decode("utf-8")
+        st.markdown("### File Contents:")
+        st.markdown(f"```{file_contents}```")
+
+    # Wait for 5 seconds
+    time.sleep(5)
+
+    # Show completed message
+    st.success("File processing completed!")
+
+if __name__ == "__main__":
+    main()