save project

my_tree.py

 import turtle
-
+import random
 def tree(n):
-    if n>=50:
+    if n>=0:
+        if n<=12:
+            color_a=["snow","lightcoral"]
+            color=random.choice(color_a)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
         pen.forward(n)
-        pen.right(30)
+        a=random.randint(0,30)
+        l=random.randint(1,15)
+        pen.right(a)
         tree(n-15)
-        pen.left(60)
+        pen.left(2*a)
         tree(n-15)
-        pen.right(30)
+        pen.right(a)
         pen.up()
         pen.backward(n)
+        
         pen.down()
     
 pen = turtle.Turtle()
@@ -20,3 +31,4 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 pen.left(90)
 tree(100)
+