save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 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
+x=["snow","lightcoral"]
 
 
 def tree(n):
 def tree(n):
-    if(n>=50):
+    if(n>=0):
+        if n<=12:
+            y=random.choice(x)
+            pen.pencolor(y)
+            pen.pensize(n/3)
+        else:
+            pen.pencolor("sienna")    
+            pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
         pen.right(30)
         pen.right(30)
         tree(n-10)
         tree(n-10)