Introduction - If you have any usage issues, please Google them yourself
There is a vacuum cleaner agent, in 10* 10 big map, the outer walls are (so actually 8* 8), a vacuum cleaner at the meeting only, under the left and right, idle, smoke dust. Please at least the minimum of power and the extent of the dirt, so that a vacuum cleaner in 2000 to complete the step-by-step.