save project

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
+pen.penup()
+pen.left(90)
+pen.backward(100)
+pen.pendown()
+def tree(n):
+    if n >= 0:
+        if n < 15:
+            color_list = ["snow","pink"]
+            pen.color(random.choice(color_list))
+            pen.pensize(n/5)
+        else:
+            pen.color("sienna")
+            pen.pensize(n/10)
+        pen.forward(n)
+        jd = random.randint(15,45)
+        pen.right(jd)
+        cd = random.randint(5,15)
+        tree(n-cd)
+        pen.left(2*jd)
+        tree(n-cd)
+        pen.right(jd)
+        pen.penup()
+        pen.backward(n)
+        pen.pendown()
+tree(60)
+turtle.done()
\ No newline at end of file