save project

my_tree.py

@@ -9,19 +9,28 @@ 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(290)    # 后退
+pen.backward(300)    # 后退
 pen.down()
 pen.down()
-pen.forward(150)
-pen.right(30)
+pen.hideturtle()
 def tree(n):
 def tree(n):
-    if n>30:
+    if n>10:
+        if n<=17:
+            sd=['snow','lightcoral']
+            color=random.choice(sd)
+            pen.color(color)
+            pen.pensize(n/5)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        angle=random.random()
+        pen.right(30*angle)
+        length = 1.5*angle
+        tree(n-10*length)
+        pen.left(60*angle)
+        tree(n-10*length)
+        pen.right(30*angle)
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
-tree(90)
+tree(70)
\ No newline at end of file