save project

my_tree.py

 import turtle
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.speed()
 w = turtle.Screen()
 w.bgcolor('wheat') 
 pen.left(90)
+pen.up()
+pen.backward(250)
+pen.down()
 def tree(n):  
-    if n>=50:# wheat小麦
-
+    if n>=50:
+        
+        pen.pensize(n/10)
+        ww2=random.randint(0,30)
+        ww1=random.randint(1,30)
         pen.color("red")
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
+        pen.right(ww2)
+        tree(n-ww1)
+        pen.left(ww2*2)
+        tree(n-ww1)
         pen.up()
-        pen.right(30)
+        pen.right(ww2)
         pen.backward(n)
         pen.down()
+    if n<=12:
+            pen.pencolor("snow")
+            pen.pensize(n/3)
+    else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
 tree(100)