part2

degrees	direction
0	north
45	northEast
90	east
135	sourtheast
180	sourth
225	sourthWest
270	West
315	northWest
360	north

按照位置可以计算出想要移动的相对方向，基本可以向任意方向移动
最远是对角线的距离：根号200
如果要移出格子就会报错


改变颜色使用下面的函数移动石头到bug上面它会移开：

### GUI Summary

Mouse Action	Keyboard Shortcut	Result
Click on an empty location	Select empty location with cursor keys and press the Enter key	Shows the constructor menu
Click on an occupied location	Select occupied location with cursor keys and press the Enter key	Shows the method menu
Select the Location -> Delete menu item	Press the Delete key	Removes the occupant in the currently selected location from the grid
Click on the Step button	空格	Calls act on each actor
Click on the Run button		Starts run mode (in run mode, the action of the Step button is carried out repeatedly)
Click on the Stop button	空格	Stops run mode
Adjust the Slow/Fast slider		Changes speed of run mode
Select the Location -> Zoom in/Zoom out menu item	Press the Ctrl+PgUp / Ctrl+PgDn keys	Zooms grid display in or out
Adjust the scroll bars next to grid	Move the location with the cursor keys	Scrolls to other parts of the grid (if the grid is too large to fit inside the window)
Select the World -> Set grid menu item	右移	Changes between bounded and unbounded grids
Select the World -> Quit menu item	Press the Ctrl+Q keys Q	Quits GridWorld