Query for collecting time

[Frank Kirschner]

Hi,
A table has two columns: stamp (DATETIME) and status (TINYINT) and looks like:
stamp___________________status
2016-03-24 11:50:58_____2
2016-03-24 11:51:00_____1
2016-03-24 11:52:50_____2
2016-03-24 11:52:52_____1
2016-03-24 11:54:20_____2
2016-03-24 11:54:45_____1
2016-03-24 14:28:09_____2
2016-03-24 14:31:09_____1
2016-03-24 14:38:50_____2
2016-03-24 14:38:55_____1
2016-03-24 15:55:58_____2
2016-03-24 15:59:09_____1
2016-03-24 16:36:05_____2
2016-03-24 16:41:27_____1
2016-03-24 16:43:36_____2

The meaning of status is: 1 = machine off, 2 = machine on. My goal is to find out how long was the machine on per day, that is the difference between a row where the status of the previous was 1 and switched to 2. Is there a statement what can do this, compare a previous line with the next and so on?

thanks,
best regards
Frank