save project

my_tree.py

 import turtle
 import turtle
-
+import random
+angle=random.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
+
 def tree(n):
 def tree(n):
-    if n>=50:
+    # if sz<=12:
+        
+    #     pen.color('snow' or 'lightcoral')
+    #     pen.pensize(sz/3)
+    # else:
+    #     pen.color('sienna')
+    #     pen.pensize(sz/10)
+    if n>=0:
+        pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
-        pen.right(30)
-        tree(n-50)
-        pen.left(60)
-        tree(n-50)
-        pen.right(30)
+        angle = random.randint(0,30)
+        sz = random.randint(1,15)
+        if n-sz<=12:
+        
+            pen.color('snow' or 'lightcoral')
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        pen.right(angle)
+        tree(n-sz)
+        pen.left(2*angle)
+        tree(n-sz)
+        pen.right(angle)
         pen.backward(n)
         pen.backward(n)
         
         
 # 移动到起点
 # 移动到起点
@@ -21,6 +40,6 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
-tree(100)
+tree(60)
 
 
 turtle.done()
 turtle.done()