auto save

my_tree.py

+import turtle
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.left(90)
+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()
+tree(70)
+# pen.goto(0,0)# 移动到起点
+# pen.left(90)
+# pen.forward(100)
+# pen.left(30)
+# pen.forward(50)
+# pen.up()
+# pen.backward(50)    # 后退
+# pen.down()
+# pen.right(60)
+# pen.forward(50)
+# pen.up()
+# pen.backward(50)    # 后退
+# pen.left(30)
+# pen.backward(100)
+
+turtle.done()