group() {
	group();
	group();
	multmatrix([[1, 0, 0, -10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		group();
	}
	multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		group() {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = false);
		}
	}
	group() {
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = false);
		}
		multmatrix([[1, 0, 0, -10], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 2, r2 = 2, center = false);
		}
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = false);
		}
		multmatrix([[1, 0, 0, 10], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 4, r2 = 4, center = false);
		}
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 10], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = false);
		}
	}
	group() {
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = false);
		}
		multmatrix([[1, 0, 0, -10], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 2, r2 = 2, center = false);
		}
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = false);
		}
		multmatrix([[1, 0, 0, 10], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 4, r2 = 4, center = false);
		}
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = false);
		}
	}
	group() {
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			difference() {
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = true);
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 2, r1 = 0.5, r2 = 0.5, center = true);
			}
		}
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			difference() {
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = true);
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 2, r1 = 1.5, r2 = 1.5, center = true);
			}
		}
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			difference() {
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = true);
				cylinder($fn = 0, $fa = 12, $fs = 2, h = 2, r1 = 2.5, r2 = 2.5, center = true);
			}
		}
	}
	group() {
		multmatrix([[1, 0, 0, -15], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cube(size = [1, 6, 2], center = true);
		}
		multmatrix([[1, 0, 0, -13], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cube(size = [1, 6.8, 2], center = true);
		}
		multmatrix([[1, 0, 0, -11], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cube(size = [1, 7.6, 2], center = true);
		}
		multmatrix([[1, 0, 0, -9], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cube(size = [1, 8.4, 2], center = true);
		}
		multmatrix([[1, 0, 0, -7], [0, 1, 0, 30], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cube(size = [1, 9.2, 2], center = true);
		}
	}
	group() {
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = false);
		}
		multmatrix([[1, 0, 0, 10], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 4, r2 = 4, center = false);
		}
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = false);
		}
		multmatrix([[1, 0, 0, -10], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 2, r2 = 2, center = false);
		}
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = false);
		}
	}
	group() {
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = false);
		}
		multmatrix([[1, 0, 0, -10], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 2, r2 = 2, center = false);
		}
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 3, r2 = 3, center = false);
		}
		multmatrix([[1, 0, 0, 10], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 4, r2 = 4, center = false);
		}
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 40], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = false);
		}
	}
	group();
	group();
	group();
	group() {
		multmatrix([[1, 0, 0, -20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 1, r2 = 1, center = false);
		}
		multmatrix([[1, 0, 0, -10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 2, r2 = 2, center = false);
		}
		multmatrix([[1, 0, 0, 20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			cylinder($fn = 0, $fa = 12, $fs = 2, h = 1, r1 = 5, r2 = 5, center = false);
		}
	}
	group();
	group();
	group();
	group();
	group() {
		group();
	}
	group() {
		group();
	}
	group();
	group() {
		group();
	}
	group();
	group();
	group();
	group() {
		group();
	}
	group();
	group();
	group();
	group();
	group();
	group();
	group();
	group();
	group();
	group();
	group();
	group();
}