All procedures start time end time calculate through script

Question

Procedure Name	Start Time	End Time	Elapsed Time
Script1	021219 05:23:34	021219 05:23:38	4 Seconds
Script2	021219 05:23:39	021219 05:23:39	0 Second
Script3	021219 05:23:40	021219 05:24:00	20 Seconds