save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Pen()
 pen = turtle.Pen()
 pen.color('yellow')
 pen.color('yellow')
 # 画布大小
 # 画布大小
@@ -13,17 +13,26 @@ pen.backward(150)# 后退
 pen.down()
 pen.down()
 
 
 def tree(n):
 def tree(n):
-    if n>=50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
+    if n<=12:
+        color_list = ["snow",'lightcoral']
+        color = random.choice(color_list)
+        pen.color(color)
+        pen.pensize(n/3)
+    else:
+        pen.color('sienna')
+        pen.pensize(n/10)
+    pen.forward(n)
+    angle = random.random()
+    pen.right(30*angle)
+    lenght = 1.5*random.random()
+    tree(n-10*lenght)
+    pen.left(60*angle)
+    tree(n-10*lenght)
+    pen.right(30*angle)
+    pen.up()
+    pen.backward(n)
+    pen.down()
 
 
-tree(100)
+tree(60)
 turtle.done()
 turtle.done()