save project

my_tree.py

@@ -2,14 +2,27 @@ import turtle
 
 pen = turtle.Turtle()
 pen.color('sienna')
-# 画布大小
+l=100
+s=10
+
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 
 # 移动到起点
+pen.pensize(s)
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+pen.forward(l)
+l/=2
+s/=1.5
+pen.pensize(s)
+pen.left(30)
+pen.forward(l)
+pen.backward(l)
+pen.right(60)
+pen.forward(l)
+pen.backward(l)
+pen.setheading(0)
 turtle.done()