Add explanation and spinners

app.py

@@ -146,8 +146,16 @@ def get_book_type(idx):
         return 'Short lettters'
     return 'Revelation'
 
+
+st.markdown("""
+This app is a demo of using BERT to analyze the Greek New Testament. It allows you to compare two
+clusters of Greek words (identified by their Strong's Numbers) and compare the embeddings for them.
+
+To use it, select the words you want to use for the first cluster (eg. G0025 and G0026, which are
+forms of agape), then select the words you want to use for the second cluster (eg. G5368, G5360,
+G5363, which are forms of phileo) and then hit Submit.  
+""")
 with st.form("my_form"):
-    st.write("Inside the form")
     option1 = st.multiselect('Select Strongs numbers for first concept', all_defs.keys(),
                              ['0025', '0026'], format_func=format_strong)
     option2 = st.multiselect('Select Strongs numbers for second concept', all_defs.keys(),
@@ -157,9 +165,12 @@ with st.form("my_form"):
     # Every form must have a submit button.
     submitted = st.form_submit_button("Submit")
     if submitted:
-        embeddings = get_all_embeddings({"concept1": option1, "concept2": option2})
+        with st.spinner('Calculating embeddings...'):
+            embeddings = get_all_embeddings({"concept1": option1, "concept2": option2})
+
+        with st.spinner('Reducing dimensionality...'):
+            mapper = umap.UMAP().fit([x[0] for x in embeddings])
 
-        mapper = umap.UMAP().fit([x[0] for x in embeddings])
         ts = mapper.embedding_
 
         x = ts[:, 0]