diff --git a/py/attentional_blink_sequence_generator.py b/py/attentional_blink_sequence_generator.py
index bc31c9f..64baf84 100644
--- a/py/attentional_blink_sequence_generator.py
+++ b/py/attentional_blink_sequence_generator.py
@@ -1,23 +1,49 @@
+
+#%% [markdown]
+# to run the web app, change the current directory to where the file is located and use the following command:
+# `streamlit run attentional_blink_sequence_generator.py`
+#
+# You need to install `streamlit` package before running the web app:
+# `pip install streamlit`
+
 #%%
 
 import random
 
-num_of_sequences = 10
-sequence_size = 20
-T1_positions = [4, 9]
-T2_options = ['X', 'Z']
-lags= [1, 7]
-items = 'ABCDEFGHIJKLMNOPQRSTUVWY'
+import streamlit as st
 
-# randomize T1 & T2
-T1_position = T1_positions[random.randint(0,1)]
-T2_position = T1_position + lags[random.randint(0,1)]
-T2 = T2_options[random.randint(0,1)]
+st.title('Attentional Blink Sequence Generator')
+
+num_of_sequences = st.sidebar.slider('Number of sequences', value=10)
+sequence_size = st.sidebar.slider('Sequence size', value=20, min_value=10, max_value=22)
+lag = st.sidebar.selectbox('Lag', [1,7])
+items = st.sidebar.text_input('Items','ABCDEFGHIJKLMNOPQRSTUVWY')
+T1_position = st.sidebar.selectbox('T1 Position', [4,9])
+T2 = st.sidebar.selectbox('T2', ['X', 'Z'])
+T2_position = T1_position + lag
+
+# randomlized raw python parameters
+#num_of_sequences = 10
+#sequence_size = 20
+#T1_positions = [4, 9]
+#T2_options = ['X', 'Z']
+#lags= [1, 7]
+#items = 'ABCDEFGHIJKLMNOPQRSTUVWY'
+#T1_position = T1_positions[random.randint(0,1)]
+#T2 = T2_options[random.randint(0,1)]
+
+
+st.header('Sequences')
 
 for i in range(num_of_sequences):
   sequence = list(items)
   random.shuffle(sequence)
-  sequence.insert(T2_position,T2)
+  sequence.insert(T2_position, T2)
   T1 = sequence[T1_position]
-  print(''.join(sequence), f"T1={T1}({T1_position}), T2={T2}({T2_position})")
-#%%
+  sequence = sequence[0:sequence_size]
+
+  # insert markdown signs to highlight T1 and T2
+  sequence[T1_position] = f' **{T1}** '
+  sequence[T2_position] = f' **{T2}** '
+  st.write(''.join(sequence))
+