diff --git a/test10.py b/test10.py
new file mode 100644
index 0000000..06ce54d
--- /dev/null
+++ b/test10.py
@@ -0,0 +1,7 @@
+for i in range(31):
+    print(f"{i}: ", end='')
+    if i % 3 == 0:
+        print("fizz", end='')
+    if i % 5 == 0:
+        print("buzz", end='')
+    print()
\ No newline at end of file
diff --git a/test11.py b/test11.py
new file mode 100644
index 0000000..3e536d2
--- /dev/null
+++ b/test11.py
@@ -0,0 +1,26 @@
+class TomatoPrice:
+    price: float
+
+    def __init__(self, value):
+        self.price = value
+
+    def __str__(self):
+        return f"USD${self.price}"
+
+    def __radd__(self, operand):
+        self.price += operand.price
+
+b'abcdefg'
+str = b.encode('UTF-8')
+for c in str:
+    if ord(c) >= 32 and ord(c) < 127:
+        print(c)
+
+vietnam = TomatoPrice(3.0)
+japan = TomatoPrice(4.0)
+korea = TomatoPrice(5.0)
+
+vietnam + japan
+
+output = "price of tomatoes in countries A, B, C: " + str(vietnam) + " " + str(japan) + " " + str(korea) + " "
+print(output)
\ No newline at end of file
diff --git a/test4.py b/test4.py
new file mode 100644
index 0000000..c86e315
--- /dev/null
+++ b/test4.py
@@ -0,0 +1,18 @@
+import http.server
+import socketserver
+from urllib.parse import urlparse, parse_qs
+
+class MyRequestHandler(http.server.SimpleHTTPRequestHandler):
+    def do_GET(self):
+        self.send_response(200)
+        self.send_header('Content-type', 'text/plain')
+        self.end_headers()
+        output_string = "abcdefg\rhijklmnop"
+        self.wfile.write(output_string.encode())
+
+PORT = 8000
+Handler = MyRequestHandler
+httpd = socketserver.TCPServer(("", PORT), Handler)
+print(f"Serving on port {PORT}")
+
+httpd.serve_forever()
\ No newline at end of file
diff --git a/test5.py b/test5.py
new file mode 100644
index 0000000..f02d4f3
--- /dev/null
+++ b/test5.py
@@ -0,0 +1,16 @@
+def validate(str):
+    for char in str:
+        if REPLACE ME:
+            raise ValueError("Crime detected!")
+
+try:
+    validate("abcdefg")
+    print("✅ test1 pass!")
+except:
+    print("❌ test1 pass!")
+
+try:
+    validate("abcdefg\rhijklmnop")
+    print("❌ test2 fail!")
+except ValueError as err:
+    print("✅ test2 pass!")
diff --git a/test6.py b/test6.py
new file mode 100644
index 0000000..0e07e21
--- /dev/null
+++ b/test6.py
@@ -0,0 +1,9 @@
+import pickle
+data = {
+    '🍅': 3,
+    '🌭': 4,
+    '🍔': 5
+}
+
+with open('food.pickle', 'wb') as f:
+    pickle.dump(data, f, pickle.HIGHEST_PROTOCOL)
diff --git a/test7.py b/test7.py
new file mode 100644
index 0000000..c6a04ed
--- /dev/null
+++ b/test7.py
@@ -0,0 +1,6 @@
+import pickle
+
+with open('food.pickle', 'rb') as f:
+    data = pickle.load(f)
+
+pass
\ No newline at end of file
diff --git a/test8.py b/test8.py
new file mode 100644
index 0000000..8dc86fb
--- /dev/null
+++ b/test8.py
@@ -0,0 +1,17 @@
+from time import sleep
+
+def animate():
+    i:int = 0
+
+    print("==================================", end='')
+    while True:
+        print(f"\r{i}                                        ", end='')
+        i += 1
+        sleep(1)
+
+def print_newline():
+    print("\r", end='')
+
+print("1000", end='')
+print_newline()
+print("100")
\ No newline at end of file
diff --git a/test9.py b/test9.py
new file mode 100644
index 0000000..85bd5a3
--- /dev/null
+++ b/test9.py
@@ -0,0 +1,24 @@
+class Temperature:
+    temperature: float
+
+    def __init__(self, temperature):
+        self.temperature = temperature
+
+    def __add__(self, operand):
+        if operand.__class__ != '__main__.Temperature':
+            raise ValueError(f"That's not a temperature object!  It's a {operand.__class__}!")
+        self.temperature += operand.temperature
+    
+    def __str__(self):
+        return f"{self.temperature=}"
+    def insert_object(self, obj):
+        self.temperature += obj.temperature
+
+if __name__ == "__main__":
+    oven = Temperature(180.0)
+    chicken = Temperature(5.0)
+    print(f"{chicken + oven=}")
+    oven.insert_object(chicken)
+
+
+