Turtle tunnel miner. Leaves no turtle behind. Bugged and abandoned

IDs = {31,32,15}
Turtles = 2
Roof = 3


Height = 1
rednet.open("right")
shell.run("clear")
print("Press M to mine")
Roof = Roof-1
function compare()
  if turtle.getItemCount(9) ~= 0 then
	shell.run("clear")
	print("Need to empty slot number 9!")
	repeat
	  sleep(1)
	until turtle.getItemCount(9) == 0
  end
  for n=1,3 do
	turtle.select(n)
	if turtle.compare() then
	  turtle.select(1)
	  return true
	end
  end
  turtle.select(9)
  if turtle.compare() then
	turtle.select(1)
	return true
  end
  return false
end
	
function Mine()
  if Status ~= "Stuck" then
  shell.run("clear")
  print("Mining")
  Times = 0
  if Height == 1 then
	Dir = "turtle.up()"
  else
	Dir = "turtle.down()"
  end
  for n=1,Roof do
	if compare() then
	  turtle.dig()
	  if loadstring("return "..Dir)() then
		if Dir == "turtle.up()" then
		  Height = Height+1
		else
		  Height = Height-1
		  if Height > 1 then
			turtle.digDown()
		  end
		end
	  end
	else
	  prepare()
	  break
	end
  end
  if Status ~= "Stuck" then
  if compare() then
	turtle.dig()
  else
	prepare()
  end
  if Height == 1 then
	turtle.select(4)
	turtle.placeDown()
	turtle.select(1)
  end
  Check = os.startTimer(0.1)
  end
  end
end
function prepare()
  shell.run("clear")
  print("Waiting for you to press B so we can return to work")
  Status = "Stuck"
  while Height < Roof+1 do
  turtle.up()
  Height = Height+1
  end
  turtle.back()
  turtle.back()
  Check = os.startTimer(0)
  Prepare = os.startTimer(1)
end
Times = 0
Status = "idle"
Comps = {}
function checkID(id)
  for n=1,#IDs do
	if IDs[n] == id then
	  return true
	end
  end
  return false
end
while true do
  event,param1,param2 = os.pullEvent()
  if event == "rednet_message" then
	if checkID(param1) then
	  if param2 == "Checked In" and Status == "Mining" then
		if Comps[param1] == nil then
		  Comps[param1] = "Hello"
		  Times = Times+1
		end
		if Times == Turtles then
		  rednet.send(ID, "Checked In")
		  rednet.send(ID1, "Checked In")
		  Times = 0
		  Comps = {}
		  if Height == 1 then
			turtle.select(4)
			turtle.placeDown()
			turtle.select(1)
		  end
		  if turtle.forward() then
			Mine()
			Check = os.startTimer(0.1)
		  else
			repeat
			  if Height == 1 then
				turtle.select(4)
				turtle.placeDown()
				turtle.select(1)
			  end
			  turtle.dig()
			  sleep(0.1)
			until turtle.forward()
			Mine()
		  end
		end
	  elseif param2 == "Mine" then
		Status = "Mining"
		shell.run("clear")
		print("Mining")
		Mine()
		Check = os.startTimer(0.1)
	  elseif param2 == "Prepare" and Status ~= "Stuck" then
		prepare()
	  end
	end
  elseif event == "timer" and param1 == Check and Times < Turtles and Status == "Mining"  then
	rednet.send(ID, "Checked In")
	rednet.send(ID1, "Checked In")
	Check = os.startTimer(0.1)
  elseif event == "timer" and param1 == Prepare then
	rednet.send(ID, "Prepare")
	rednet.send(ID1, "Prepare")
	Prepare = os.startTimer(1)
  elseif event == "char" then
	if param1 == "m" then
	  if Status == "idle" then
		rednet.send(ID, "Mine")
		rednet.send(ID1, "Mine")
		Status = "Mining"
		Mine()
	  else
		Status = "idle"
	  end
	elseif param1 == "b" and Status == "Stuck" then
	  turtle.forward()
	  turtle.forward()
	  rednet.send(ID, "Mine")
	  rednet.send(ID1, "Mine")
	  Status = "Mining"
	  shell.run("clear")
	  print("Mining")
	  Mine()
	end
  end
end