save project

my_tree.py

@@ -8,14 +8,25 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 
 def tree(n):
-    if n>=50:
+    pen.speed(20)
+    if n>=0:
+        if n<=12:
+            color_list=["snow","lightcoral"]
+            color=random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
         pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
-        pen.penup()
+        angle=random.randint(0,30)
+        length=random.randint(1,15)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(2*angle)
+        tree(n-length)
+        pen.right(angle)
+        pen.up()
         pen.backward(n)
         pen.down()
 
@@ -28,5 +39,5 @@ pen.down()
 
 
 
-tree(100)
+tree(60)
 turtle.done()