save project

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
 pen.left(90)
 pen.up()
-pen.backward(150)    # 后退
-pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.up()
-pen.backward(50)
+pen.backward(150)
 pen.down()
-pen.left(60)
-pen.forward(50)
-turtle.done()
+# 移动到起点
+def c(n):
+    if n>=50:
+        a=random.randint(0,30)
+        b=random.randint(0,15)
+        pen.forward(n)
+        pen.right(a)
+        c(n-b)
+        pen.left(a*2)
+        c(n-b)
+        pen.up()
+        pen.right(a)
+        pen.backward(n)
+        pen.down()
+c(100)
\ No newline at end of file