local tArgs = {...}

function digLayer(len, wid)
 for i=1, wid do
  for i=1, len-1 do
   turtle.dig()
   turtle.forward()
  end
  for i=1, len-1 do
   turtle.back()
  end
  turtle.turnRight()
  turtle.dig()
  turtle.forward()
  turtle.turnLeft()
 end
end

for i=1, tArgs[3] do
 digLayer(tArgs[1], tArgs[2])
 turtle.turnLeft()
 for i=1, tArgs[2] do
  turtle.forward()
 end
 turtle.turnRight()
 turtle.digDown()
 turtle.down()
end