1group() {
2	multmatrix([[1, 0, 0, -60], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
3		group() {
4			group() {
5				difference() {
6					square(size = [20, 20], center = true);
7					square(size = [10, 10], center = true);
8				}
9			}
10		}
11	}
12}
13group() {
14	multmatrix([[1, 0, 0, -60], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
15		group() {
16			group() {
17				polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
18			}
19		}
20	}
21}
22group() {
23	multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
24		group() {
25			offset(r = 1, $fn = 0, $fa = 12, $fs = 2) {
26				group() {
27					difference() {
28						square(size = [20, 20], center = true);
29						square(size = [10, 10], center = true);
30					}
31				}
32			}
33		}
34	}
35}
36group() {
37	multmatrix([[1, 0, 0, 0], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
38		group() {
39			offset(r = 5, $fn = 0, $fa = 12, $fs = 2) {
40				group() {
41					difference() {
42						square(size = [20, 20], center = true);
43						square(size = [10, 10], center = true);
44					}
45				}
46			}
47		}
48	}
49}
50group() {
51	multmatrix([[1, 0, 0, 0], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
52		group() {
53			offset(r = 5, $fn = 0, $fa = 12, $fs = 2) {
54				group() {
55					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
56				}
57			}
58		}
59	}
60}
61group() {
62	multmatrix([[1, 0, 0, 60], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
63		group() {
64			offset(r = 1, $fn = 0, $fa = 12, $fs = 2) {
65				group() {
66					difference() {
67						square(size = [30, 30], center = true);
68						square(size = [10, 10], center = true);
69					}
70				}
71			}
72		}
73	}
74}
75group() {
76	multmatrix([[1, 0, 0, 60], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
77		group() {
78			offset(r = 5, $fn = 0, $fa = 12, $fs = 2) {
79				group() {
80					difference() {
81						square(size = [30, 30], center = true);
82						square(size = [10, 10], center = true);
83					}
84				}
85			}
86		}
87	}
88}
89group() {
90	multmatrix([[1, 0, 0, 60], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
91		group() {
92			offset(r = 5, $fn = 0, $fa = 12, $fs = 2) {
93				group() {
94					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
95				}
96			}
97		}
98	}
99}
100group() {
101	multmatrix([[1, 0, 0, 120], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
102		group() {
103			offset(r = -5, $fn = 0, $fa = 12, $fs = 2) {
104				group() {
105					difference() {
106						square(size = [40, 40], center = true);
107						square(size = [10, 10], center = true);
108					}
109				}
110			}
111		}
112	}
113}
114group() {
115	multmatrix([[1, 0, 0, 120], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
116		group() {
117			offset(r = -10.01, $fn = 0, $fa = 12, $fs = 2) {
118				group() {
119					difference() {
120						square(size = [50, 50], center = true);
121						square(size = [10, 10], center = true);
122					}
123				}
124			}
125		}
126	}
127}
128group() {
129	multmatrix([[1, 0, 0, 120], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
130		group() {
131			offset(r = -1, $fn = 0, $fa = 12, $fs = 2) {
132				group() {
133					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
134				}
135			}
136		}
137	}
138}
139group() {
140	multmatrix([[1, 0, 0, 180], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
141		group() {
142			offset(delta = 4, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
143				group() {
144					difference() {
145						square(size = [20, 20], center = true);
146						square(size = [10, 10], center = true);
147					}
148				}
149			}
150		}
151	}
152}
153group() {
154	multmatrix([[1, 0, 0, 180], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
155		group() {
156			offset(delta = 1, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
157				group() {
158					difference() {
159						square(size = [20, 20], center = true);
160						square(size = [10, 10], center = true);
161					}
162				}
163			}
164		}
165	}
166}
167group() {
168	multmatrix([[1, 0, 0, 180], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
169		group() {
170			offset(delta = 5, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
171				group() {
172					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
173				}
174			}
175		}
176	}
177}
178group() {
179	multmatrix([[1, 0, 0, 240], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
180		group() {
181			offset(delta = -2, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
182				group() {
183					difference() {
184						square(size = [30, 30], center = true);
185						square(size = [10, 10], center = true);
186					}
187				}
188			}
189		}
190	}
191}
192group() {
193	multmatrix([[1, 0, 0, 240], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
194		group() {
195			offset(delta = -5, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
196				group() {
197					difference() {
198						square(size = [40, 40], center = true);
199						square(size = [10, 10], center = true);
200					}
201				}
202			}
203		}
204	}
205}
206group() {
207	multmatrix([[1, 0, 0, 240], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
208		group() {
209			offset(delta = -1, chamfer = false, $fn = 0, $fa = 12, $fs = 2) {
210				group() {
211					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
212				}
213			}
214		}
215	}
216}
217group() {
218	multmatrix([[1, 0, 0, 300], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
219		group() {
220			offset(delta = 4, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
221				group() {
222					difference() {
223						square(size = [20, 20], center = true);
224						square(size = [10, 10], center = true);
225					}
226				}
227			}
228		}
229	}
230}
231group() {
232	multmatrix([[1, 0, 0, 300], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
233		group() {
234			offset(delta = 1, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
235				group() {
236					difference() {
237						square(size = [20, 20], center = true);
238						square(size = [10, 10], center = true);
239					}
240				}
241			}
242		}
243	}
244}
245group() {
246	multmatrix([[1, 0, 0, 300], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
247		group() {
248			offset(delta = 5, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
249				group() {
250					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
251				}
252			}
253		}
254	}
255}
256group() {
257	multmatrix([[1, 0, 0, 360], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
258		group() {
259			offset(delta = -2, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
260				group() {
261					difference() {
262						square(size = [30, 30], center = true);
263						square(size = [10, 10], center = true);
264					}
265				}
266			}
267		}
268	}
269}
270group() {
271	multmatrix([[1, 0, 0, 360], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
272		group() {
273			offset(delta = -5, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
274				group() {
275					difference() {
276						square(size = [40, 40], center = true);
277						square(size = [10, 10], center = true);
278					}
279				}
280			}
281		}
282	}
283}
284group() {
285	multmatrix([[1, 0, 0, 360], [0, 1, 0, 120], [0, 0, 1, 0], [0, 0, 0, 1]]) {
286		group() {
287			offset(delta = -1, chamfer = true, $fn = 0, $fa = 12, $fs = 2) {
288				group() {
289					polygon(points = [[-15, 80], [15, 80], [0, -15], [-8, 60], [8, 60], [0, 5]], paths = [[0, 1, 2], [3, 4, 5]], convexity = 1);
290				}
291			}
292		}
293	}
294}
295group() {
296	multmatrix([[1, 0, 0, -120], [0, 1, 0, 60], [0, 0, 1, 0], [0, 0, 0, 1]]) {
297		group() {
298			multmatrix([[30, 0, 0, 0], [0, 30, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
299				offset(r = 0.8, $fn = 0, $fa = 12, $fs = 2) {
300					square(size = [1, 1], center = false);
301				}
302			}
303		}
304	}
305}
306offset(r = 1, $fn = 0, $fa = 12, $fs = 2);
307offset(r = 1, $fn = 0, $fa = 12, $fs = 2) {
308	square(size = [0, 0], center = false);
309}
310