Starting was pretty ok but it got inconsistent towards the middle. Must be due to the lose of concentration prior to the interruption.
I think the use of metronome or drum loops will be a big help to you. I'll explain how to use them in your case. For a metronome, you just need to hear the ticking sound. For drum loops, try to identify a consistent repetative drum beat (which is usually the bass drum).
Set them at a low speed or tempo initially, e.g. 80-90 beats per minute. Since your notes are all single beats, pluck or pick your string accordingly whenever you hear a tick or a drum beat. Play your notes along with the ticks/beats slowly but clearly. If not clear, lower the speed further.
When you think you're ready to move on, increase the tempo by 10 beats per minute gradually until you get the desirable speed. If you become messy along the way, for example at 110 beats per minute you keep missing the last note, then reduce the tempo back to 100 and practice until you feel comfortable. Repeat the whole process until you think you've reached your limit.
This is one way to cultivate speed and timing which I think will also solve your "slow change" problem. This technique applies to all musical instruments.
Another good way of developing speed and timing is by sub-dividing beats. That means you first play 1 note per tick/beat at a slow tempo, then you go faster by playing 2 notes per beat (at the same tempo), then 3 notes, and so on...
Try these software for creating your own drum loops. They are free.
http://beaterator.rockstargames.com/beaterator.html
http://www.threechords.com/hammerhead/introduction.shtml
Hope these help.
thx
