chrono

#!/usr/bin/env ruby

def to_human(t)
	ms = ((t-t.floor)*10).floor
	sec = t.floor
	hour  = (sec/3600).floor
	sec -= hour * 3600
	min = (sec/60).floor
	sec -= min * 60
	sprintf "%02d:%02d:%02d.%01d", hour, min, sec, ms
end

Kernel.trap('INT') { Kernel.exit }
start = Time.now

loop do
	elapsed = Time.now - start
	sleep 0.1
	print "\b"*30
	print to_human(elapsed)
	print " "*5
	STDOUT.flush
end