save project

my_tree.py

+import turtle
+import random
+s=['snow','lightcoral','lightpink','cornflowerblue','lightsteelblue','lightgoldenrodyellow','papayawhip','lightgray','peachpuff','honeydew','powderblue']
+def shuzhi(n):
+    if n>=0:
+        if n<=12:
+            pen.pencolor(random.choice(s))
+            pen.pensize(n/3)
+        else:
+            pen.pencolor('sienna')
+            pen.pensize(n/10)
+        pen.fd(n)
+        a=random.randint(1,30)
+        d=random.randint(1,15)
+        pen.rt(a)
+        shuzhi(n-d)
+        pen.lt(a*2)
+        shuzhi(n-d)
+        pen.rt(a)
+        pen.up()
+        pen.bk(n)
+        pen.down()
+
+pen = turtle.Turtle()
+pen.speed(0)
+pen.color('sienna')
+
+
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('gray')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+shuzhi(60)
+
+
+turtle.done()