save project

my_tree.py

+import random
 import turtle
-
+def tree(n,degree):
+    if 9<n:
+        
+        pen.pensize(n/10)
+        if n==10 or n==20:
+            c=["snow","orange","violet","pink","lightcoral","purple","white","black","blue","grey"]
+            pen.color(random.choice(c))
+            pen.pensize(3)
+        else:
+            pen.color('sienna')
+        degree=random.randint(15,40)
+        pen.forward(n)
+        pen.right(degree)
+        tree(n-10,0)
+        pen.left(2*degree)
+        tree(n-10,0)
+        pen.right(degree)
+        pen.up()
+        pen.backward(n)
+        pen.down()
 pen = turtle.Turtle()
+pen.speed(100)
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-
-# 移动到起点
+w.bgcolor('wheat')
 pen.left(90)
 pen.up()
-pen.backward(150)    # 后退
-pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.backward(50)
-pen.left(60)
-pen.forward(50)
+pen.backward(400)
+pen.down()      # wheat小麦
+tree(100,0)
+# 移动到起点
+
 
 turtle.done()