save project

my_tree.py

@@ -4,7 +4,9 @@ pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
+w.bgcolor('wheat') 
+
+        
 
 # 移动到起点
 pen.left(90)
@@ -13,8 +15,18 @@ pen.backward(150)    # 后退
 pen.down()
 
 def tree(n):
-    if n>=10:
 
+
+
+    if n>=0:
+        if n<=12:
+            c=['snow','lightcoral']
+            cr=random.choice(c)
+            pen.pencolor(cr) 
+            pen.pensize(n/3)  
+        else:
+            pen.pencolor('sienna')
+            pen.pensize(n/10) 
         pen.forward(n)
         a=random.randint(0,30)
         l=random.randint(1,15)
@@ -27,5 +39,5 @@ def tree(n):
         pen.backward(n)
         pen.down()
 
-tree(50)
+tree(60)
 turtle.done()