Update README.md

Author: psyclone20

README.md

@@ -1,2 +1,18 @@
 # Android-Pattern-Generator
-A Java program to generate all the possible patterns on a traditional 3x3 Android lock screen
+A Java program that uses DFS to generate all the possible patterns on a traditional 3x3 Android lock screen
+
+# Output
+The program generates all the possible 389,112 patterns and creates 2 files:
+* `sequential.txt` that contains the patterns arranged sequentially
+* `shuffled.txt` that contains the patterns arranged randomly
+
+For reference, the numbers in the output are mapped to the points as:
+```
+0     1     2
+
+
+3     4     5
+
+
+6     7     8
+```