save project

dd.py

+import turtle
+import random
+list = ['snow','lightcoral']
+def tree(n):
+
+    if n >= 0:
+        if n <= 12:
+            pen.pencolor(random.choices(list))
+            pen.forward(n/3)
+        else:
+            pen.pencolor('sienna')
+            length = random.randint(1,15)
+            angle = random.randint(15,30)
+            pen.forward(n)
+            pen.right(angle)
+            tree(n-length)
+            pen.left(angle*2)
+            tree(n-length)
+            pen.right(angle)
+            pen.penup()
+            pen.forward(-n)
+            pen.pendown()
+        
+        
+
+pen = turtle.Turtle()
+
+# 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()
+
+tree(60)
+
+turtle.done()
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