save project

my_tree.py

+import turtle
+import random
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+ 
+#分型树
+def tree(n):
+    if n > 0:
+        if pen.pensize() > 12:
+            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()
+        else:
+            
+tree(60)
+turtle.done()