save project

my_tree.py

@@ -11,11 +11,17 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+color=["snow","lightcoral"]
 def tree(n):
-    if n>=10:
-        long=random.randint(5,15)
-        jiao=random.randint(5,50)
+    if n>=0:
+        long=random.randint(1,20)
+        jiao=random.randint(1,30)
+        if n<=20:
+            pen.pensize(n/3)
+            pen.pencolor(random.choice(color))
+        else:
+            pen.pensize(n/10)
+            pen.pencolor("sienna")
         pen.forward(n)
         pen.right(jiao)
         tree(n-long)
@@ -26,6 +32,5 @@ def tree(n):
         pen.forward(-n)
         pen.pendown()
         
-        
 tree(100)
 turtle.done()
\ No newline at end of file