diff --git a/src/Main.java b/src/Main.java
index 0282a9d..6004f97 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -59,14 +59,48 @@ public static void main(String[] args) {
         System.out.println("size: " + size);
 
         // call your method here
-
+        int newSize = urlify(buffer, size);
         // check the "after" buffer contents via println
+        System.out.println(Arrays.toString(buffer));
         // check to see if the new buffer's size is correct
-
+        System.out.println("size: " + newSize);
 
     }
 
     // write your method here
+    // method will modify buffer directly
+    // method will return the new size
+    public static int urlify(char[] buffer, int size){
+
+        //count up the number of spaces
+        int numOfSpaces = 0;
+        for (int i = 0; i < size; i++) {
+            if (buffer[i] == ' '){
+                numOfSpaces++;
+            }
+        }
+
+        int newSize = size + (2 * numOfSpaces);
+
+
+        //modify the buffer, starting from the back
+        for (int i = size - 1; i >=0; i--) {
+            if (buffer[i] == ' '){
+                // buffer[7] = buffer[8]
+                //buffer[i-1] = buffer[i];
+               buffer[newSize-1] = '0';
+               buffer[newSize-2] = '2';
+               buffer[newSize-3] = '%';
+               newSize = newSize-3;
+            }else{//whitespace not found
+                buffer[newSize-1] = buffer[i];
+                newSize--;
+            }
+        }
+        newSize = size + (2 * numOfSpaces);
+        return newSize;
+    }
+
 
 
-}
\ No newline at end of file
+}