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.speed(100)
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+def tree(n):
+    if n<=12:
+        c_l=['#FEEEED','#DB7093','#F0FFFF','#1E90FF','#B22222','#DAA520','#191970']
+        c=random.choice(c_l)
+        pen.color(c)
+        pen.pensize(n/5)
+    else:
+        pen.color('sienna')
+        pen.pensize(n/10)
+    if n>=10:
+        pen.forward(n)
+        s=random.randint(0,30)
+        l=random.randint(0,15)
+        pen.right(s)
+        tree(n-l)
+        pen.left(2*s)
+        tree(n-l)
+        pen.right(s)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+tree(60)
+
+turtle.done()