import?math
import?os
import?pygame
import?time
from?random?import?randint?uniform?random
from?pygame.locals?import?*

#define?the?screen?size
SCREEN_SIZE?=?（300?300）

#define?enum?edge
EDGE_LEFT?=?1
EDGE_BOTTOM?=?2
EDGE_RIGHT?=?3
EDGE_TOP?=?4

def?load_image（folderPath?name?colorkey=None）:
????“““?load?image?and?set?a?colorkey?for?it“““
????fullname?=?os.path.join（folderPath?name）
????try:
????????image?=?pygame.image.load（fullname）
????except?pygame.error?message:
????????print?‘Cannot?load?image:‘?fullname
????????raise?SystemExit?message
????
????image?=?image.convert（）
????if?colorkey?is?None:
????????colorkey?=?image.get_at（（0?0））
????????image.set_colorkey（colorkey?RLEACCEL）
????????
????return?image

def?wait_enter_pressed（keys）:
????“blo

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????134??2010-06-18?15:24??ball.bmp

?????文件????????682??2012-07-25?11:38??flight.png

?????文件????????578??2012-07-25?11:42??flightleft.png

?????文件????????572??2012-07-25?11:44??flightright.png

?????文件???????8228??2012-07-25?15:56??InsistMoreThan20s.py

-----------?---------??----------?-----??----

????????????????10194????????????????????5