Basic Timer (Farm)

bEnd = false

parallel.waitForAny(
 function()
  while true do
   redstone.setOutput("bottom",true)
   redstone.setOutput("top",false)

   iCounterNeg=60

   for iCounter=1,600,1 do
    shell.run('clear')
    print("Harvesting...")
    iCounterNeg=iCounterNeg-0.1
    print("Time remaining until WAITING: "..iCounterNeg.." seconds")
    print("")
    print("Press any key (except ESC) to end")
    sleep(0.1)
   end

   redstone.setOutput("bottom",false)
   redstone.setOutput("top",true)

   iCounterNeg=180

   for iCounter=1,1800,1 do
    shell.run('clear')
    print("WAITING")
    iCounterNeg=iCounterNeg-0.1
    print("Time remaining until HARVEST: "..iCounterNeg.." seconds")
    print("")
    print("Press any key (except ESC) to end")
    sleep(0.1)
   end
  end
 end,

 function()
  while not bEnd do
   local event, key = os.pullEvent("key")
   if key ~= keys.escape then
    bEnd = true
   end
  end
 end
)

shell.run('clear')

redstone.setOutput("bottom",false)
redstone.setOutput("top",true)

print("Farm Turned Off")