save project

my_tree.py

+import turtle
+
+def tree(n):
+    if n>=50:
+        pen.pensize(n/10)
+        pen.forward(n)
+        angle = random.randint(0,30)
+        length = random.randint(1,15)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(2*angle)
+        tree(n-length)
+        pen.right(angle)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+pen = turtle.Turtle()
+pen.color('sienna')
+if n<=12：
+    pen.color('snow'or'lightcoral')
+    pen.pensize(n/10)
+else:
+    pen.color('sienna')
+    pen.pensize(n/10)
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
\ No newline at end of file