diff --git a/app.py b/app.py
index 92832af..22c2519 100644
--- a/app.py
+++ b/app.py
@@ -1,28 +1,48 @@
-from flask import Flask, render_template, jsonify
-import random
-
-app = Flask(__name__)
-
-
-lotto_numbers = list(range(1,46))
-
-@app.route("/")
-def hello():
-
-    return render_template("index.html", variable=lotto)
-
-@app.route("/lotto",methods=['GET'])
-def lotto():
-    lotto = select_numbers(6)
-    return jsonify(lotto)
-
-def select_numbers(select_amount:int):
-    ### 이곳을 같이 채워봐요
-
-    lotto = [1,2,3,4,5,6]
-
-
-    return lotto
-
-if __name__ == "__main__":
-    app.run(host='0.0.0.0', port=8080)
\ No newline at end of file
+from flask import Flask, render_template, jsonify
+import random
+
+app = Flask(__name__)
+
+lotto_numbers = list(range(1,46))
+
+@app.route("/")
+def hello():
+    return render_template("index.html", variable=lotto)
+
+@app.route("/lotto",methods=['GET'])
+def lotto():
+    lotto = select_numbers(6)
+    return jsonify(lotto)
+
+def select_numbers(select_amount:int):
+    ## 01
+    lotto = []
+    for i in range(select_amount):
+        while True:
+            selected_num = random.randint(1,45)
+
+            is_duplicated = False
+            for num in lotto:
+                if selected_num == num:
+                    is_duplicated = True
+                    break
+
+            if is_duplicated:
+                continue
+            lotto.append(selected_num)
+            break
+
+    ## 02
+    #candidate_numbers = lotto_numbers[:]
+    #lotto = []
+    #for i in range(select_amount):
+    #    selected_num = candidate_numbers.pop(random.randrange(len(candidate_numbers)))
+    #    lotto.append(selected_num)
+
+    ## 03
+    #lotto = random.sample(lotto_numbers, select_amount)
+
+    return lotto
+
+if __name__ == "__main__":
+    app.run(host='0.0.0.0', port=8080)