time : time.Datetime()
timestamp : time.Timestamp()
timer : std.CountTimer()
fmt : text.Format(fmt="Current date is {century}{year}/{month}/{day}, time is {hour}:{minute}")
print : io.Print()
log : test.Sink()

timer.integer > time.trigger
time.datetime > fmt.dict
fmt.text > print.token

timer.integer > timestamp.trigger
timestamp.timestamp > log.token


