save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 pen.speed(10000)
 pen.speed(10000)
 # 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
-
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
@@ -14,7 +13,10 @@ pen.backward(150)    # 后退
 pen.down()
 pen.down()
 def tree(n):
 def tree(n):
     if n>=50:
     if n>=50:
+        pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
+        a=random.randint(0,30)
+        b=random.randint(0,15)
         pen.right(30)
         pen.right(30)
         tree(n-10)
         tree(n-10)
         pen.left(60)
         pen.left(60)
@@ -23,5 +25,13 @@ def tree(n):
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
+        if b<=12:
+            c=random.randint(1,2)
+            if c==1:
+                pen.color("snow")
+            else:
+                pen.color("lightcoral")
+            pen.pensize(a*3)
+            
 tree(100)
 tree(100)
 turtle.done()
 turtle.done()
\ No newline at end of file