bug fix

app.py

@@ -149,12 +149,13 @@ def main():
         update_plot(df, preds, axs, fig)
 
     def update_plot2(ax):
-    x = np.linspace(0, 2*np.pi, 100)
-    y = np.sin(x)
-    ax.plot(x, y, label='New Line')
-    ax.legend()
-    st.pyplot()
+        x = np.linspace(0, 2*np.pi, 100)
+        y = np.sin(x)
+        ax.plot(x, y, label='New Line')
+        ax.legend()
+        st.pyplot()
 
+    st.button('Add Line')
     # Create an initial plot
     figs, ax = plt.subplots()
     x_initial = np.linspace(0, 2*np.pi, 100)