diff --git a/4.py b/4.py
new file mode 100644
index 0000000..205e905
--- /dev/null
+++ b/4.py
@@ -0,0 +1,20 @@
+import turtle
+screen=turtle.Screen()
+screen.bgcolor("light blue")
+pen=turtle.Pen()
+pen.penup()
+pen.goto(100,-100)
+pen.write("hi",font=("Times",20,"normal"))
+pen.hideturtle()
+pen1=turtle.Pen()
+pen1.pencolor("red")
+pen1.pensize(5)
+len=60
+pen1.left(45)
+pen1.forward(100)
+pen1.circle(50,180)
+pen1.right(90)
+pen1.circle(50,180)
+pen1.forward(100)
+pen1.hideturtle()
+turtle.done()
diff --git a/diy3.py b/diy3.py
index 8d700b2..6fe9343 100644
--- a/diy3.py
+++ b/diy3.py
@@ -1,7 +1,7 @@
 message = "诺依,周末一起去看漫展吧"
 length = len(message)
 i = 0
-while i < length
+while i < length:
     element = message[i]
     print(element)
     i += 1
\ No newline at end of file