restore Arm2D example

examples/Arm2D/main.py

@@ -0,0 +1,23 @@
+from PikaObj import *
+import PikaStdLib
+import Arm2D
+
+mem = PikaStdLib.MemChecker()
+mem.max()
+win = Arm2D.Window()
+win.init()
+win.background.setColor('white')
+win.elems.box = Arm2D.Box()
+win.elems.box.init()
+while True:
+    win.elems.box.move(20, 20)
+    win.elems.box.setColor('green')
+    win.update()
+    win.elems.box.move(30, 50)
+    win.elems.box.setColor('blue')
+    win.update()
+    win.elems.box.move(50,30)
+    win.elems.box.setColor('red')
+    win.update()
+    mem.max()
+