function stat_read()
{
	getline <"/proc/stat"
	close("/proc/stat")
	work_prev = work
	total_prev = total
	work = $2 + $3 + $6 + $7 + $8 + $9 + $10 + $11
	total = work + $4 + $5
}

BEGIN\
{
	stat_read()
	while (1)
	{
		sleep(delay)
		split($0, old)
		stat_read()
		usage = (work - work_prev) / (total - total_prev)
		printf "p%s%02u%%\n", (usage > high ? red : ""), usage
	}
}