default test case

app.py

@@ -11,8 +11,10 @@ def convert_df(df):
 # title and instructions
 st.title('TIGER Cas13 Efficacy Prediction')
 st.session_state['userInput'] = ''
-st.session_state['userInput'] = st.text_input('Enter a target transcript (or substring thereof):',
-                                              placeholder='Upper or lower case')
+st.session_state['userInput'] = st.text_input(
+    label='Enter a target transcript:',
+    value='ATGCAGGACGCGGAGAACGTGGCGGTGCCCGAGGCGGCCGAGGAGCGCGC',
+    placeholder='Upper or lower case')
 
 # input is too short
 if len(st.session_state['userInput']) < TARGET_LEN: