When I'm in town, there is only a bus every 30 mins home. If I'm in the pub, I don't care what time it is now, I care how many minutes it is to the next bus ho

When I'm in town, there is only a bus every 30 mins home. If I'm in the pub, I don't care what time it is now, I care how many minutes it is to the next bus home. I want a watch face that just has 2 or 3 numbers, number of minutes to next few buses home. The last bus of the night should be highlighted quite a lot, with alarms for that.