save project

my_tree.py

 import turtle
 import turtle
-
+import random
 t = turtle.Turtle()
 t = turtle.Turtle()
 t.color('sienna')
 t.color('sienna')
+t.hideturtle()
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
@@ -13,17 +14,29 @@ t.backward(150)    # 后退
 t.down()
 t.down()
 
 
 def tree(n):
 def tree(n):
-    if n>=50:
-        t.pensize(100)
-        t.speed(-1)
+    if n>= 0:
+        if n<=12:
+            t.speed(100)
+            color_list = ['snow','lightcoral']
+            color = random.choice(color_list)
+            t.color(color)
+            t.pensize(n / 3)
+        else:
+            t.color('sienna')
+            t.pensize(n / 10)
         t.forward(n)
         t.forward(n)
-        t.right(30)
-        tree(n-50)
-        t.left(60)
-        tree(n-50)
-        t.right(30)
+        angle = random.random()
+        t.right(30*angle)
+        length = 1.5*random.random()
+        tree(n-10*length)
+        t.left(60*angle)
+        tree(n-10*length)
+        t.right(30*angle)
         t.up()
         t.up()
         t.backward(n)
         t.backward(n)
         t.down()
         t.down()
-tree(100)
-turtle.done()
+tree(60)
+turtle.done()
\ No newline at end of file
+for i in range (5):
+    tree()
+    lt(72)
\ No newline at end of file