save project

my_tree.py

+import turtle
+import random
+
+
+def tree(n):
+    if n>=12:
+        
+       
+        ang=random.randint(0,30)
+        leng=random.randint(10,15) 
+        size_=n/10
+        pen.pensize(size_)
+        pen.color("sienna")
+        pen.down()
+        pen.forward(n)
+        pen.right(ang)
+        tree(n-leng)
+        pen.left(ang*2)
+        tree(n-leng)
+        pen.right(ang)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+    else:
+        pen.pensize(4)
+        pen.color("snow")
+        pen.forward(10)
+        pen.backward(10)
+        pen.right(10)
+        pen.color("lightcoral")
+        pen.forward(10)
+        pen.backward(10)
+        pen.left(10)
+        
+
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.pensize(50)
+
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+# pen.forward(100)
+# pen.right(30)
+# pen.forward(50)
+# pen.backward(50)
+# pen.left(60)
+# pen.forward(50)
+# pen.backward(50)
+# pen.right(30)
+# pen.backward(100)
+
+tree(100)
+
+turtle.done()