save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
-
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
-
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.down()
-pen.left(60)
-pen.forward(50)
-
-
-pen.right(60)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.down()
-pen.left(30)
-pen.forward(50)
-
-pen.right(30)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.down()
-pen.left(60)
-pen.forward(50)
-
-pen.right(90)
-pen.forward(50)
-pen.up()
-pen.backward(50)
-pen.down()
-pen.left(80)
-pen.forward(50)
-
-
-turtle.done()
+pen.speed(10)
+# pen.forward(100)
+# pen.right(30)
+# pen.forward(50)
+# pen.up()
+# pen.backward(50)
+# pen.down()
+# pen.left(60)
+# pen.forward(50)
+
+def tree(n):
+    if n >= 50:
+        if n <= 12:
+            color_list = ['snow','lightcoral']
+            color = random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n / 3)
+        else:
+            pen.color('yellow')
+            pen.pensize(n/10)    
+        pen.forward(n)
+        angle = random.randint(0,30)
+        length = random.randint(5,15)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(angle*2)
+        tree(n-length)
+        pen.right(angle)
+        pen.penup()
+        pen.backward(n)
+        pen.pendown()
+
+tree(100)
+
+turtle.done()
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