save project

my_tree.py

 import turtle
+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')
-pen.speed(2)
+
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
@@ -12,16 +23,18 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.penup()
-pen.backward(50)
-pen.left(60)
-pen.pendown()
-pen.forward(50)
-pen.penup()
-pen.backward(50)
-pen.right(30)
-pen.backward(100)
+
+# pen.forward(100)
+# pen.right(30)
+# pen.forward(50)
+# pen.penup()
+# pen.backward(50)
+# pen.left(60)
+# pen.pendown()
+# pen.forward(50)
+# pen.penup()
+# pen.backward(50)
+# pen.right(30)
+# pen.backward(100)
+tree(105)
 turtle.done()