group() {
	multmatrix([[1, 0, 0, 0], [0, 1, 0, -20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			circle($fn = 0, $fa = 12, $fs = 2, r = 5);
			square(size = [8, 8], center = true);
		}
	}
	multmatrix([[1, 0, 0, -10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			circle($fn = 0, $fa = 12, $fs = 2, r = 5);
			square(size = [0, 0], center = true);
		}
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			group();
			circle($fn = 0, $fa = 12, $fs = 2, r = 5);
			square(size = [8, 8], center = true);
		}
	}
	multmatrix([[1, 0, 0, 20], [0, 1, 0, -20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
		}
	}
	multmatrix([[1, 0, 0, 20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[-0.5, -0.86602540378, 0, 0], [0.86602540378, -0.5, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					circle($fn = 0, $fa = 12, $fs = 2, r = 15);
				}
			}
		}
	}
	multmatrix([[1, 0, 0, 20], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[-0.5, -0.86602540378, 0, 0], [0.86602540378, -0.5, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					circle($fn = 0, $fa = 12, $fs = 2, r = 15);
				}
			}
			multmatrix([[-0.5, 0.86602540378, 0, 0], [-0.86602540378, -0.5, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					circle($fn = 0, $fa = 12, $fs = 2, r = 15);
				}
			}
		}
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		intersection() {
			multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[1, 0, 0, 5], [0, 1, 0, 8.66025403784], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[1, 0, 0, -5], [0, 1, 0, 8.66025403784], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[1, 0, 0, -10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[1, 0, 0, -5], [0, 1, 0, -8.66025403784], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
			multmatrix([[1, 0, 0, 5], [0, 1, 0, -8.66025403784], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				circle($fn = 0, $fa = 12, $fs = 2, r = 15);
			}
		}
	}
}