auto save

my_tree.py

+import turtle
+import random
+
+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()
+
+def tree(n):
+    if n >= 10:
+        lenth = random.randint(5,15)
+        if n <= 12:
+            pen.pensize(lenth /3)
+            color = random.choice("snow","lightcoral")
+            pen.color(color)
+        else:
+            pen.color(sienna)
+            pen.pensize(n /10)
+        angle = random.randint(5,40)
+        pen.forward(n)
+        pen.left(angle)
+        # if n > 50:
+        tree(n -lenth)
+        pen.right(angle *2)
+        # if n > 50:
+        tree(n -lenth)
+        pen.left(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+
+tree(80)
+# pen.right(30)
+# pen.forward(50)
+# pen.up()
+# pen.backward(50)
+# pen.left(30)
+# pen.backward(100)
+# pen.down()
+
+turtle.done()