init

drawing_recursively.py

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+#!/usr/bin/env python3
+from turtle import Pen
+
+
+def draw_ornament(pen, scale=150):
+    if scale > 1:
+        for angle in range(0, 360, 90):
+            pen.setheading(angle)
+            back = pen.pos()
+            if scale <= 10:
+                pen.pd()
+            pen.forward(scale)
+            draw_ornament(pen, scale // 2)
+            pen.pu()
+            pen.setpos(back)
+
+def setup_pen():
+    pen = Pen()
+    pen.ht()
+    pen.pu()
+    pen.speed(0)
+    pen.screen.setup(1000, 900)
+    pen.screen.title("Watch me running")
+    pen.screen.bgcolor("white")
+    pen.screen.tracer(n=10) # draws only nth frame to speed up drawing
+    pen.color("blue")
+    pen.setpos(0, 0)
+    return pen
+
+if __name__ == '__main__':
+    pen = setup_pen()
+    try:
+        draw_ornament(pen)
+    except KeyboardInterrupt:
+        exit()
+    input('All done!\nPress Enter to quit')
+    exit()