save project

my_tree.py

+import turtle
+import random
+
+
+def Draw(length, max=10):
+    if length >= max:
+        angle = random.randint(15, 45)
+        _length = random.randint(10, 15)
+        pen.forward(length)
+        pen.right(angle)
+        Draw(length - _length)
+        pen.left(2 * angle)
+        Draw(length - _length)
+        pen.right(angle)
+        pen.up()
+        pen.backward(length)
+        pen.pendown()
+
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+
+Draw(100)
+
+
+turtle.done()