# A tibble: 12 x 2
  x                   y                  
  <dttm>              <dttm>             
1 2016-01-01 12:34:57 2016-01-01 12:34:57
2 2016-01-01 12:34:58 2016-01-01 12:34:58
3 2016-01-01 12:34:59 2016-01-01 12:34:59
4 2016-01-01 12:35:00 2016-01-01 12:35:00
5 2016-01-01 12:35:01 2016-01-01 12:35:01
6 2016-01-01 12:35:02 2016-01-01 12:35:02
7 2016-01-01 12:35:03 2016-01-01 12:35:03
8 2016-01-01 12:35:04 2016-01-01 12:35:04
# … with 4 more rows
