diff --git a/Presentations/RCOS.pdf b/Presentations/RCOS.pdf
new file mode 100644
index 0000000..625c5df
Binary files /dev/null and b/Presentations/RCOS.pdf differ
diff --git a/Presentations/RCOSPPT.pptx b/Presentations/RCOSPPT.pptx
new file mode 100644
index 0000000..4d63594
Binary files /dev/null and b/Presentations/RCOSPPT.pptx differ
diff --git a/learning/FileMoniter.py b/learning/FileMoniter.py
new file mode 100644
index 0000000..c31dc30
--- /dev/null
+++ b/learning/FileMoniter.py
@@ -0,0 +1,30 @@
+import os
+import time
+import platform
+
+def main(AskForPath = False, Intervtime = 5):
+    if AskForPath:
+        print("Enter the path: ")
+        print("If the program is already in the requested directory, press 'Enter' directly. (Use / to replace \\):",end = ' ')
+        path = input("")
+        if path != "":
+            os.chdir(path)   # change the path
+    else:
+        if 'windows' in platform.platform().lower():  
+            path = os.getcwd()  
+        else:
+            path = os.getcwdu()  
+    allfile = os.listdir(path)
+    print('Current Files:', allfile)
+    while 1:
+        newfile = os.listdir(path)
+        if allfile != newfile:
+            print("Changes Found")
+            print('Current Files:', newfile)
+            time.sleep(Intervtime)
+            allfile = newfile          
+
+            
+if __name__ == '__main__':
+    main()
+        
\ No newline at end of file
diff --git a/sample/AnswerSheet.py b/sample/AnswerSheet.py
index 04f4439..b1779a6 100644
--- a/sample/AnswerSheet.py
+++ b/sample/AnswerSheet.py
@@ -1,6 +1,7 @@
 from Box import Box
 import cv2
 
+
 class AnswerSheet(object):
     def __init__(self,myCentre=(0.0,0.0),myAnswerArea = 0.0):
         self.centre = myCentre
diff --git a/sample/Box.py b/sample/Box.py
index 1ab0ffc..3026300 100644
--- a/sample/Box.py
+++ b/sample/Box.py
@@ -7,13 +7,15 @@ def __init__(self, my_contour):
         self.area = cv2.contourArea(my_contour)
         self.centre = self.find_centre()
 
-    def find_centre(self):
+    def find_centre(self, printed=False):
         x_axis = []
         y_axis = []
         for point in self.contour:
             x_axis.append(point[0][0])
             y_axis.append(point[0][1])
-        # print cnts[0][0][0][0]
+        if printed:
+            pass
+            # print(cnts[0][0][0][0])
         x_axis = sorted(x_axis)
         y_axis = sorted(y_axis)
         x_centre = int((x_axis[0] + x_axis[-1]) / 2)