save project

my_tree.py

+import turtle
+import random
+def m(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.fd(n)
+        a=random.random()
+        pen.right(30*a)
+        l=1.5*random.random()
+        m(n-10*l)
+        pen.left(60*a)
+        m(n-10*l)
+        pen.right(30*a)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+pen = turtle.Turtle()
+pen.color('sienna')
+turtle.speed(100)
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+
+m(50)       
+
+turtle.done()