save project

my_tree.py

 import turtle
 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(0,30)
+        sadm=random.randint(1,15)
+        pen.right(angle)
+        tree(n-sadm)
+        pen.left(2*angle)
+        tree(n-sadm)
+        pen.right(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
+pen.speed(100)
 # 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
 
 
+
 # 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()
 
 
+tree(60)
+
+
+
 turtle.done()
 turtle.done()