save project

my_tree.py

 import turtle
+import random
 
+def tree(n):
+    if n>=0:
+        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.randint(1,30)
+        length=random.randint(1,15)
+        pen.right(angle)
+        tree(n-angle)
+        pen.left(2*angle)
+        tree(n-angle)
+        pen.right(angle)
+        pen.penup()
+        pen.backward(n)
+        pen.pendown()
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
+w.bgcolor('wheat')
+speed(1000)
 
-# 移动到起点
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+tree(90)
+'''      # wheat小麦
+pen.forward(100)
+pen.right(30)
+pen.forward(50)
+pen.penup()
+pen.backward(50)
+pen.pendown()
+
+pen.left(60)
+pen.forward(50)
+pen.penup()
+pen.backward(50)
+pen.pendown()
+
+pen.right(30)
+pen.penup()
+# 移动到起点
 
+pen.backward(100)
+pen.pendown()
+'''
 turtle.done()