Hot streak

I'm trying to find a good way to visualize how often I get pulled into conversations at work. With the data at hand it seems easiest to do this by graphing out "working" streaks.

For now I've defined a streak as typing with breaks shorter than 10 mins. The X is the length of the streak. The y is how much typing was done during the streak. The interval colors get redder the less liking it is for a streak to last that long.

Do you have any suggestions on making this clearer?