save project

my_tree.py

 import turtle
+import random
 
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
+turtle.speed(100)
 
 # 移动到起点
 pen.left(90)
@@ -13,13 +15,22 @@ pen.backward(150)    # 后退
 pen.down()
 
 def long(n):
-    if n>=50:
+    if n>=0:
+        if n <= 12:
+            color_list=["snow","lightcoral"]
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/10)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
+        l = 1.5*random.random()
+        a = random.random()
         pen.forward(n)
-        pen.right(30)
-        long(n-50)
-        pen.left(60)
-        long(n-50)
-        pen.right(30)
+        pen.right(n-10*l)
+        pen.left(60*a)
+        long(n-10*l)
+        pen.right(30*a)
         pen.up()
         pen.backward(n)
         pen.down()
@@ -27,6 +38,6 @@ def long(n):
 
 
       
-long(100)
+long(80)
 
 turtle.done()