save project

my_tree.py

@@ -6,7 +6,7 @@ pen.color('sienna')
 # 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
-
+pen.speed(0)
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
@@ -30,7 +30,13 @@ pen.down()
 # pen.down()
 # pen.down()
 def tree(n):
 def tree(n):
     if n>=0:
     if n>=0:
-        pen.pensize(n/10)
+        if n<=12:
+            pen_list=["snow","lightcoral"]
+            pen.pensize(n/3)
+            pen.pencolor(random.choice(pen_list))
+        else:
+            pen.pencolor("sienna")
+            pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
         angle=random.randint(0,30)
         angle=random.randint(0,30)
         length = random.randint(1,15)
         length = random.randint(1,15)