save project

my_tree.py

@@ -2,12 +2,22 @@ import turtle
 import random
 import random
 def tree(n):
 def tree(n):
     if n>=0:
     if n>=0:
+        if n <=12:
+            color_list=['snow','pink']
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        angle=random.random()
+        pen.right(30*angle)
+        length=1.5*random.random()
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
@@ -22,9 +32,16 @@ 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()
-pen.backward(150)    # 后退
+pen.backward(n)    # 后退
 pen.down()
 pen.down()
 
 
 
 
 tree(60)
 tree(60)
 turtle.done()
 turtle.done()
+
+
+
+
+angle=random.randint(0,30)
+        lenht=random
+        pen.left(2*angle)
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