Update app.py

app.py

@@ -1,26 +1,17 @@
 import streamlit as st
 
 # Define URLs
-url1 = "https://www.example1.com"
-url2 = "https://www.example2.com"
-url3 = "https://www.example3.com"
-url4 = "https://www.example4.com"
+urls = [
+    "https://www.example1.com",
+    "https://www.example2.com",
+    "https://www.example3.com",
+    "https://www.example4.com"
+]
 
-# Embed URLs using iframes
-iframe1 = f'<iframe src="{url1}" width="800" height="600"></iframe>'
-iframe2 = f'<iframe src="{url2}" width="800" height="600"></iframe>'
-iframe3 = f'<iframe src="{url3}" width="800" height="600"></iframe>'
-iframe4 = f'<iframe src="{url4}" width="800" height="600"></iframe>'
+# Create a 4x4 grid of iframes with no gaps
+columns = st.beta_columns(4)
 
-# Display iframes using Markdown
-st.markdown(f"### Layout 1")
-st.markdown(iframe1, unsafe_allow_html=True)
-
-st.markdown(f"### Layout 2")
-st.markdown(iframe2, unsafe_allow_html=True)
-
-st.markdown(f"### Layout 3")
-st.markdown(iframe3, unsafe_allow_html=True)
-
-st.markdown(f"### Layout 4")
-st.markdown(iframe4, unsafe_allow_html=True)
+for i in range(4):
+    with columns[i]:
+        iframe_code = f'<iframe src="{urls[i]}" width="100%" height="400" style="border:0;"></iframe>'
+        st.markdown(iframe_code, unsafe_allow_html=True)