save project

my_tree.py

@@ -2,7 +2,6 @@ import turtle
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
-pen.pensize(10)
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
@@ -17,10 +16,13 @@ def tree(a):
         pen.forward(a)
         pen.forward(a)
         pen.left(30)
         pen.left(30)
         pen.forward(a-50)
         pen.forward(a-50)
-        pen.forward(50-a)
-        pen.left(-60)
+        pen.up()
+        pen.backward(a-50)
+        pen.down()
+        pen.right(60)
         pen.forward(a-50)
         pen.forward(a-50)
-        pen.forward(50-a)
+        pen.up()
+        pen.backward(a-50)
         pen.left(30)
         pen.left(30)
         pen.forward(-a)
         pen.forward(-a)
 tree(100)
 tree(100)