group() {
	circle($fn = 0, $fa = 12, $fs = 2, r = 1);
	multmatrix([[1, 0, 0, 0], [0, 1, 0, 3], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 5], [0, 1, 0, 1], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 12, $fs = 2, r = 3);
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, -1], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 12, $fs = 2, r = 0);
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, -3], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 4, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 3], [0, 1, 0, -3], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 8, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 6], [0, 1, 0, -3], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 12, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, -6], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 20, $fs = 0.3, r = 1);
	}
	multmatrix([[1, 0, 0, 3], [0, 1, 0, -6], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 30, $fs = 0.3, r = 1);
	}
	multmatrix([[1, 0, 0, 6], [0, 1, 0, -6], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0, $fa = 40, $fs = 0.3, r = 1);
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, -9], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 0.1, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 3], [0, 1, 0, -9], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 8, $fa = 12, $fs = 2, r = 1);
	}
	multmatrix([[1, 0, 0, 6], [0, 1, 0, -9], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		circle($fn = 8, $fa = 12, $fs = 2, r = 1);
	}
}