save project

my_tree.py

+import turtle
+turtle.speed(0)
+def tree(n):
+    if n>=0:
+        turtle.forward(n)
+        turtle.right(30)
+        tree(n-10)
+        turtle.left(60)
+        tree(n-10)
+        turtle.right(30)
+        turtle.up()
+        turtle.forward(-n) 
+        turtle.down()
+
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+turtle.left(90)
+turtle.up()
+turtle.backward(150)
+turtle.down()
+
+tree(60)
+turtle.done()