save project

my_tree.py

@@ -11,25 +11,33 @@ w.bgcolor('wheat')      # wheat小麦
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
-pen.backward(150)    # 后退
+pen.backward(300)    # 后退
 pen.down()
 pen.down()
 pen.speed(0)
 pen.speed(0)
 
 
 def tree(n):
 def tree(n):
     if n >= 0:
     if n >= 0:
+        if n <= 12:
+            color_list = ["snow","lightcoral","lightcoral"]
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
         angle = random.randint(0,30)
         angle = random.randint(0,30)
         length = random.randint(1,15)
         length = random.randint(1,15)
-        pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
         pen.right(angle)
         pen.right(angle)
         tree(n-length)
         tree(n-length)
         pen.left(angle*2)
         pen.left(angle*2)
         tree(n-length)
         tree(n-length)
         pen.right(angle)
         pen.right(angle)
+        pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.pendown()
         pen.pendown()
     
     
-tree(70)
+tree(90)
 
 
 turtle.done()
 turtle.done()