[Lua][Question] Countdown Timer on Loop?

Psychyn, on 21 January 2013 - 07:27 AM said:

Hey there.

So I've been improving at LUA slowly and unsteadily. My recent achievement was learning how to write messages on monitors (yay!); Proud of being a newb, I'm looking into a countdown timer that loops after a small amount of time has passed. From what I understood, the sleep() function helps with that.

Now; I've browsed these forums but can't seem to find a code that makes sense to me. (They either have some output signal, lock doors or do other stuff) What I'm looking for is a timer that counts down from X amount of seconds; To pause a minute, then to start counting again with no further help needed. It just repeats itself over and over on a screen, not outputting anything, nor triggering. Just constantly repeating the message.

The idea is to sync it with the Railroad (Railcraft thing) I've been building, so that when the timer reaches 0 the train is actually on the station. Then it waits a minute, and when the train goes off it starts counting down again.

So:
Timer counts down from 3 minutes.
Reaches 0.
Waits for the train to leave again. ~Minute or so. (sleep function?)
When it's left, the counter starts at 3 again and counts down.

I'm trying to avoid hooking it up to redstone and sensors and rather time it myself with a watch as that seems much easier. xD

I'm sorry if it's been asked before, or if it's somewhere on the wiki. Either a helping hand with searching is appreciated, or insight into the code I'm looking for. =) Thanks in advance; Alternative ideas welcome if that's easier.

term.clear()
term.setCursorPos(1,1)
function seconds()
for i = 1,60 do
print(i)
sleep(1)
term.clear()
term.setCursorPos(1,1)
end
end
seconds()

seconds = 180 --number of seconds in the timer
wait = 60  --time to wait
while true do
  for i = seconds,1,-1 do
    print(seconds)
    sleep(1)
   end
   sleep(wait)
end

Willibilly19, on 21 January 2013 - 07:34 AM said:

This doesn't seem like it would be too hard. I'm new to Lua myself, but I can give it a shot. snip

seconds = 180 --number of seconds in the timer
wait = 60  --time to wait
while true do
  for i = 1,seconds do
	print(seconds-i)
	sleep(1)
   end
   sleep(wait)
end

term.clear()
term.setCursorPos(3,2)
print("Estimated Travel Times: ETT")
term.setCursorPos(3,4)
print("Dorfanos <-> SquareSky City")
term.setCursorPos(3,5)
print("Fourty-Two Seconds")
term.setCursorPos(3,7)
print("Train arriving in..")
term.setCursorPos(5,8)
function seconds()
seconds = 42
wait = 60
for i = 1, seconds do
	   print(seconds-i)
	   sleep(1)
term.setCursorPos(5,8)
end
end
seconds()

monitor = peripheral.wrap("left") -- where left is the side of the monitor in respect to the computer

monitor.write("hi") -- take note: there is no print function so you would need to change cursor pos all the time

term.clear()
term.setCursorPos(3,2)
print("Estimated Travel Times: ETT")
term.setCursorPos(3,4)
print("Dorfanos <-> SquareSky City")
term.setCursorPos(3,5)
print("Fourty-Two Seconds")
term.setCursorPos(3,7)
print("Train arriving in..")
term.setCursorPos(5,8)
seconds = 42
wait = 10 -- For testing purposes
while true do
  for i = 1, seconds do
		   print(seconds-i)
		   sleep(1)
term.setCursorPos(5,8)
end
end
seconds()

term.clear()
term.setCursorPos(3,2)
print("Estimated Travel Times: ETT")
term.setCursorPos(3,4)
print("Dorfanos <-> SquareSky City")
term.setCursorPos(3,5)
print("Fourty-Two Seconds")
term.setCursorPos(3,7)
print("Train arriving in..")
term.setCursorPos(5,8)
seconds = 42
wait = 63 -- Is completely ignored at the moment.
while true do
  for i = 1, seconds do
				   print(seconds-i)
				   sleep(1)
term.clear() -- Fixed the jump to 100. Thanks forum search.
term.setCursorPos(5,8)
end
end
seconds()

term.clear()
term.setCursorPos(3,2)
print("Estimated Travel Times: ETT")
term.setCursorPos(3,4)
print("Dorfanos <-> SquareSky City")
term.setCursorPos(3,5)
print("Fourty-Two Seconds")
term.setCursorPos(3,7)
print("Train arriving in..")
term.setCursorPos(5,8)
seconds = 42
wait = 63 -- Is completely ignored at the moment.
while true do
  for i = 1, seconds do
							print(seconds-i)
							sleep(1)
term.clear() -- Fixed the jump to 100. Thanks forum search.
term.setCursorPos(5,8)
end
sleep(wait)
end
seconds()

end
end
sleep(wait)
seconds()

sleep(wait)
end
end
seconds()

function info()
  term.clear()

  term.setCursorPos(3,2)
  print("Estimated Travel Times: ETT")

  term.setCursorPos(3,4)
  print("Dorfanos <-> SquareSky City")

  term.setCursorPos(3,5)
  print("Fourty-Two Seconds")

  term.setCursorPos(3,7)
  print("Train arriving in..")

  term.setCursorPos(5,8)
end

seconds = 42
wait = 63 

i = seconds

while true do
  while i <= seconds and i > 0 do
	i = i - 1
	info()
	print(i)
	sleep (1)
  end
  if i == 0 then
    i = seconds
    info()
    print("Arrived")
  end
  sleep(wait)
end

bios:206: [string "track":1: '<name>' expected

function info()
  term.clear()

  term.setCursorPos(3,2)
  print("Estimated Travel Times: ETT")

  term.setCursorPos(3,4)
  print("Dorfanos <-> SquareSky City")

  term.setCursorPos(3,5)
  print("Fourty-Two Seconds")

  term.setCursorPos(3,7)
  print("Train arriving in..")

  term.setCursorPos(5,8)
end

seconds = 42
wait = 63

i = seconds

while true do
  while i <= seconds and i > 0 do
		i = i - 1
		info()
		print(i)
		sleep (1)
  end
  if i == 0 then
	i = seconds
	info()
	print("Arrived")
  end
  sleep(wait)
end

local arriveTime = os.clock() + 42

while os.clock() < arriveTime do
   info()
   print(arriveTime - os.clock())
   sleep(1)
end

info()
print"Arrived"