u2

src/u2.py

@@ -0,0 +1,65 @@
+import turtle
+
+radius = 100
+t = turtle.Turtle()
+t.speed(100)
+t.penup()
+
+def a():
+    t.setheading(180)
+    t.forward(radius*3)
+    circle2(False)
+    t.setheading(0)
+    t.penup()
+    t.forward(radius*2)
+    circle2(True)
+    t.setheading(0)
+    t.penup()
+    t.forward(radius*2)
+    circle2(False)
+    t.setheading(0)
+    t.penup()
+    t.forward(radius*2)
+    circle2(True)
+
+def b():
+    circle2(False)
+    t.setheading(90)
+    t.forward(radius*2)
+    circle2(True)
+    t.setheading(180)
+    t.forward(radius*2)
+    circle2(False)
+    t.setheading(270)
+    t.forward(radius*2)
+    circle2(True)
+
+
+def c():
+    circle2(False)
+    t.setheading(90)
+    t.forward(radius*2)
+    circle2(False)
+    t.setheading(180)
+    t.forward(radius*2)
+    circle2(True)
+    t.setheading(270)
+    t.forward(radius*2)
+    circle2(True)
+
+def circle2(reverse):
+    if reverse:
+        t.dot(radius*2, "black")
+        t.dot(radius, "gray")
+    else:
+        t.dot(radius*2, "gray")
+        t.dot(radius, "black")
+
+def main():
+    func = input("a b abo c\n")
+    globals().get(func)()
+
+    input()
+
+if __name__ == "__main__":
+    main()