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
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+def tree(x):
+    if x >=0:
+        if x<10:
+            color_list=["snow","lightcoral"]
+            color1 =random.choice(color_list)
+            pen.color(color1)
+            pen.pensize(x/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(x/10)
+        angle=random.randint(15,25)
+        lennt=random.randint(10,16)
+        pen.forward(x)
+        pen.right(angle)
+        tree(x-lennt)
+        pen.left(2*angle)
+        tree(x-lennt)
+        pen.right(angle)
+        pen.backward(x)
+tree(70)
+turtle.done()
+