local tArgs = { ... }
local nCount = tArgs[1]

if not nCount then
  print("Usage: dig <count>")
  return
end

if nCount==0 then
  print("Arg 1, <count> must be greater than zero!")
  return
end

while nCount do
  if not turtle.detect() then
    turtle.forward()
    nCount = nCount - 1
  else
    turtle.dig()
  end
end