ID = 1
ID1 = 1


Height = 1
rednet.open("right")
shell.run("clear")
print("Press M to mine")
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
      return true
    end
  end
  turtle.select(9)
  if turtle.compare() then
    return true
  end
  return false
end

function Mine()
  shell.run("clear")
  print("Mining")
  Times = 0
  if Height == 1 then
    Dir = "turtle.up()"
  else
    Dir = "turtle.down()"
  end
  for n=1,2 do
    if compare() then
      turtle.dig()
      loadstring(Dir)()
      if Dir == "turtle.up()" then
        Height = Height+1
      else
        Height = Height-1
      end
    else
      prepare()
    end
  end
  if compare() then
    turtle.dig()
  else
    prepare()
  end
  Check = os.startTimer(0.1)
end
function prepare()
  shell.run("clear")
  print("Waiting for you to press B so we can return to work")
  Status = "Stuck"
  while Height < 3 do
  turtle.up()
  Height = Height+1
  end
  turtle.back()
  turtle.back()
end
Times = 0
Status = "idle"
while true do
  event,param1,param2 = os.pullEvent()
  if event == "rednet_message" then
    if param1 == ID1 or param1 == ID then
      if param2 == "Checked In" then
        if ID == param1 and not OD then
          OD = "yes"
          Times = Times+1
        elseif ID1 == param1 and not OS then
          OS = "yes"
          Times = Times+1
        end
        if Times == 2 then
          rednet.send(ID, "Checked In")
          rednet.send(ID1, "Checked In")
          Times = 0
          OS = false
          OD = false
          if turtle.forward() then
            Mine()
            Check = os.startTimer(0.1)
          else
            repeat
              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)
      end
    end
  elseif event == "timer" and param1 == Check and Times < 2 and Status ~= "idle"  then
    rednet.send(ID, "Checked In")
    rednet.send(ID1, "Checked In")
    Check = os.startTimer(0.1)
  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()
      shell.run("clear")
      print("Mining")
      Mine()
    end
  end
end