diff --git a/README.md b/README.md
deleted file mode 100644
index d27672e..0000000
--- a/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# python-lotto-app
-
-이건 로또 앱이에요! 로또번호 생성기에요
diff --git a/app.py b/app.py
index 92832af..6b94f70 100644
--- a/app.py
+++ b/app.py
@@ -20,7 +20,37 @@ def select_numbers(select_amount:int):
     ### 이곳을 같이 채워봐요
 
     lotto = [1,2,3,4,5,6]
-
+ ## example 1
+    lotto = []
+    for i in range(select_amount):
+
+        while True:
+            select_num = random.randint(1, 45)
+
+            is_duplicated = False
+            for num in lotto:
+                if select_num == num:
+                    is_duplicated = True
+                    break
+
+            if is_duplicated:
+                continue
+            lotto.append(select_num)
+            break
+
+    ## example 2
+    '''
+    candidate_numbers = lotto_numbers[:]
+    lotto = []
+    for i in range(select_amount):
+        select_num = candidate_numbers.pop(random.randrange(len(candidate_numbers)))
+        lotto.append(select_num)
+    '''
+
+    ## example 3
+    '''
+    lotto = random.sample(lotto_numbers, select_amount)
+    '''
 
     return lotto