CountDown

h = 0
m = 0
s = 30
mon = peripheral.wrap("front")

function Depart()

  if h ==0 and m == 0 and s == 0 then
    term.clear()
    term.setCursorPos(1,1)
    redstone.setOutput("left", true)
    print("Train is Departing")
    sleep(5)
    term.clear()
    term.setCursorPos(1,1)
    redstone.setOutput("left", false)
    print("Waiting for the next Train")
    sleep(66)
    h = 0
    m = 9
    s = 59
  end
end

function Check()

  if s <= -1 then
    m = m -1
    s = 59
  end

  if m < 0 then
    h = h -1
    m = 60
  end

  if redstone.getInput("right", true) then
    h = 0
    m = 0
    s = 0
  end

  Depart()

end

while true do
  term.redirect(peripheral.wrap("front"))
  mon.setTextScale(4)
  term.clear()
  term.setCursorPos(1,1)

  print("Train Will Depart In:")
  mon.setCursorPos(6,4)
  print(m..":"..s)
  sleep(1)
  s = s-1
  Check()
end