save project

my_tree.py

 import turtle
 
 pen = turtle.Turtle()
+pen.speed(0)
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
@@ -12,4 +13,18 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+#画二叉树
+pen.forward(100)
+pen.right(30)
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.down()
+pen.left(60)
+pen.forward(50)
+pen.up()
+pen.forward(-50)
+pen.right(30)
+pen.backward(100)
+pen.down()
 turtle.done()