save project

my_tree.py

+import random 
+import turtle
+def tree(n):
+    if n>=0:
+        pen.fd(n)
+        pen.rt(30)
+        tree(n-10)
+        pen.lt(60)
+        tree(n-10)
+        pen.pu()
+        pen.rt(30)
+        pen.bk(n)
+        pen.down()
+
+
+
+
+
+
+
+
+
+
+pen = turtle.Pen()
+
+pen.speed(0)
+## 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.pencolor('sienna')
+pen.pd()
+ #移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+tree(50)
+turtle.done()
+#pen.fd(100)
+#pen.rt(30)
+#pen.fd(50)
+#pen.pu()
+#pen.bk(50)
+#pen.lt(60)
+#pen.pd()
+#pen.fd(50)
+#pen.pu()
+#pen.bk(50)
+#pen.rt(30)
+#pen.bk(100)
+#pen.hideturtle()
+