tunnel 1-3

while true do
 turtle.select(1)
 turtle.digDown()
 turtle.dig()
 turtle.digUp()
  while true do
   if turtle.getItemCount(16) ~= 0
    then
    shell.run('clear')
    print("Add Chests")
    sleep(1)
    else
     break
   end
  end
 while true do
  if turtle.getFuelLevel() > 2
   then
     turtle.forward()
     break
   else
    shell.run('clear')
    print("Add Fuel")
    sleep(1)
    shell.run('refuel')
  end
 end
end