save project

my_tree.py

 import turtle
+import random
+list = ["snow", "light coral"]
 
 def tree(n):
-    if n >= 50:
+    if n >= 0:
+        if n <= 12:
+            pen.pencolor(random.choice(list))
+            pen.pensize(n/3)
+        else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
+        pen.pensize(n/10)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        angle = random.randint(0, 30)
+        length = random.randint(1, 15)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(2*angle)
+        tree(n-length)
+        pen.right(angle)
         pen.penup()
         pen.backward(n)
         pen.pendown()
         
 
+
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小