save project

my_tree.py

 import turtle
+from random import choice,randint
+
+def tree(n):
+    if n==50:
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -7,9 +20,20 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 
 # 移动到起点
+pen.speed(100000)
+pen.pensize(3)
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+tree(190)
+#while True:
+#    pen.forward(100)
+#    pen.left(30)
+#    pen.forward(50)
+ #   pen.backward(50)
+#    pen.right(60)
+#    pen.forward(50)
+#    pen.backward(50)
 
 turtle.done()