save project

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
+pen.speed(0)
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
@@ -9,21 +10,38 @@ w.bgcolor('wheat')      # wheat小麦
 # 移动到起点
 pen.left(90)
 pen.up()
-pen.backward(150)    # 后退
+pen.backward(200)    # 后退
 pen.down()
 
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.left(60)
-pen.down()
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.right(30)
-pen.backward(100)
-pen.down()
+def stick(londen):
+    if londen >=0:
+        if londen <= 12:
+            color=['snow','lightcoral']
+            pen.pensize(londen/3)
+            pen.pencolor(random.choice(color))
+        else:
+            pen.pensize(londen/10)
+            pen.pencolor('sienna')
+
+        angle=random.randint(1,30)
+        lenth=random.randint(1,15)
+        pen.forward(londen)
+        pen.right(angle)
+        stick(londen-lenth)
+        pen.left(2*angle)
+        stick(londen-lenth)
+        pen.right(angle)
+
+        pen.up()
+        pen.backward(londen)
+        pen.down()
+    # pen.forward(50)
+    # pen.up()
+    # pen.backward(50)
+    # pen.right(30)
+    # pen.backward(100)
+    # pen.down()
+
+stick(70)
 
 turtle.done()
\ No newline at end of file