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
+
+def tree(n):
+    if n>=0:
+        if n<=12:
+            pen.pensize(n/3)
+            color = random.choice(["snow","lightcoral"])
+            pen.pencolor(color)
+        else:
+            pen.pencolor('sienna')
+            pen.pensize(n/10)
+        anglg = random.randint(0,30)
+        pen.forward(n)
+        pen.right(anglg)
+        tree(n - 10)
+        pen.left(2*anglg)
+        tree(n - 10)
+        pen.right(anglg)
+        pen.backward(n)
+
+        anglg = random.randint(0,30)
+        cd = random.randint(10,15)
+        
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.speed(0)
+
+tree(100)
+turtle.done()
\ No newline at end of file