import streamlit as st
import pandas as pd
import numpy as np

# Title of the dashboard
st.title('Simple Data Dashboard')
# Create a sample dataframe
df = pd.DataFrame({
'Column A': np.random.randn(100),
'Column B': np.random.randn(100),
'Column C': np.random.randn(100)
})
# Display the dataframe
st.write("Here's a sample dataframe:", df)
# Add a line chart
st.line_chart(df)