add test chart

app.py

@@ -1,4 +1,37 @@
 import streamlit as st
+import numpy as np
+import pandas as pd
+import altair as alt
 
-x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+
+gene_id_1 = st.text_input(
+    label = "Gene 1",
+    value = "CNAG0000001",
+    max_chars = 20,
+    help = "CNAG Gene ID e.g. CNAG0000001")
+
+gene_id_2 = st.text_input(
+    label = "Gene 2",
+    value = "CNAG0000002",
+    max_chars = 20,
+    help = "CNAG Gene ID e.g. CNAG0000002")
+
+
+chart_data = pd.DataFrame(
+    np.random.randn(20, 3),
+    columns=["a", "b", "c"])
+
+chart = (
+   alt.Chart(chart_data)
+   .mark_circle()
+   .encode(
+       x="a",
+       y="b",
+       size="c",
+       color="c",
+       tooltip=["a", "b", "c"])
+)
+
+st.altair_chart(
+    chart,
+    use_container_width=True)