title: How to make a time index in dataframe pandas with 15 minutes spacing
body: <p>How to make a time index in dataframe pandas with 15 minutes spacing for 24 hours with out the date format (12\4\2020 00:15)or doing it manually?
  example that I only want is 00:15 00:30 00:45.........23:45 00:00 as an index.</p>