auto save

my_tree.py

 import turtle
 import turtle
+import random
+
+def draw(n):
+    if n>=4:
+        a = random.randint(5,25)
+        b = random.randint(5,14)
+        pen.pensize(n/7)
+        pen.fd(n)
+        pen.right(a)
+        draw(n-b)
+        pen.left(a*2)
+        draw(n-b)
+        pen.right(a)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+        if n/8<4:
+            pen.pensize(n/4)
+            pen.color('lightcoral')
+        elif n/8<5:
+            pen.pensize(n/4)
+            pen.color('snow')
+        elif n/12<6: 
+            pen.pensize(n/2)
+            pen.color('green')
+        else:
+            pen.color('sienna')
+            pen.pensize(n/8)
 
 
 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
+pen.pensize(10)
+pen.speed(60)      
 
 
 # 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(150)    # 后退
 pen.down()
 pen.down()
+draw(75)
 
 
 turtle.done()
 turtle.done()