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(0)
 pen.speed(0)
@@ -8,27 +8,15 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
 
 
 def tree(n):
 def tree(n):
-    if n>=0:
-        angle = random.randint(15,30)
-        lenth = random.randint(1,15)
-        pencolor=["snow","lightcoral"]
-        tree_lenth=n-lenth
-        if tree_lenth <5:
-            pen.color(random.choice(pencolor))
-            pen.pensize(3)
-        else:
-            pen.pensize(n/10)
-            pen.color("sienna")
-
-            
+    if n>=10:
         pen.forward(n)
         pen.forward(n)
-        pen.right(angle)
-        tree(tree_lenth)
+        pen.right(30)
+        tree(n-15)
 
 
-        pen.left(2*angle)
-        tree(tree_lenth)
+        pen.left(60)
+        tree(n-15)
 
 
-        pen.right(angle)
+        pen.right(30)
         pen.up()
         pen.up()
         pen.bk(n)
         pen.bk(n)
         pen.down()
         pen.down()
@@ -41,6 +29,6 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
-tree(60)
+tree(100)
 
 
 turtle.done()
 turtle.done()