Update app.py

app.py

@@ -1,4 +1,10 @@
 import streamlit as st
 
 x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+st.write(x, 'squared is', x * x)
+
+import numpy as np
+import matplotlib.pyplot as plt
+fig, ax = plt.subplots()
+ax.plot(np.random.randn(10, 5)
+st.pyplot(fig)