Unable to clear or delete columns from 'beta_columns'

[Charly_Wargnier]

Hi @cjl , and welcome to the Streamlit community!

Have you tried with:

import time

for seconds in range(60):

    with placeholder.container():

        kpi1, kpi2 = st.columns(2)

        kpi1.write(f"Hourglass with flowing sand {seconds} seconds have passed")

        kpi2.write(f"Hourglass with flowing sand {seconds * 2} seconds have passed")

        time.sleep(1)

    placeholder.empty()