save project

my_tree.py

 import turtle
+import random   
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -8,13 +9,29 @@ w.bgcolor('wheat')
 
 def tree(n):
     if n>=50:
-    pen. forward(n)
-    pen.right(30)
-    tree(n-10)
-    pen.up()
-    pen.left(60)
-    pen.backward(n)
-    pen.down()
+        if n>=0:
+            if n>=12:
+                x = random.randint(1,2)
+                if x==1:
+                    pen.color("snow")
+                else:
+                    pen.color("lightcoral")
+                pen.color(x)
+                pen.pensize(n/3)
+            else:
+                pen.color('sienna')
+
+        pen.pensize(n/10)
+        a = random.randint(0,30) 
+        b = random.randint(0,15)
+    
+        pen. forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.up()
+        pen.left(60)
+        pen.backward(n)
+        pen.down()
        # wheat小麦
 
 # 移动到起点