group() {
	multmatrix([[2, 0, 0, 0], [0, 1.33333333333, 0, 0], [0, 0, 2, 0], [0, 0, 0, 1]]) {
		group() {
			square(size = [2, 3], center = true);
		}
	}
	multmatrix([[1, 0, 0, 5], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		multmatrix([[2, 0, 0, 0], [0, 1.33333333333, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			group() {
				square(size = [2, 3], center = true);
			}
		}
	}
	multmatrix([[1, 0, 0, 10], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		multmatrix([[2, 0, 0, 0], [0, 2, 0, 0], [0, 0, 2, 0], [0, 0, 0, 1]]) {
			group() {
				square(size = [2, 3], center = true);
			}
		}
	}
	linear_extrude(height = 100, center = false, convexity = 1, scale = [1, 1], $fn = 0, $fa = 12, $fs = 2) {
		multmatrix([[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			group() {
				square(size = [2, 3], center = true);
			}
		}
	}
	linear_extrude(height = 100, center = false, convexity = 1, scale = [1, 1], $fn = 0, $fa = 12, $fs = 2) {
		multmatrix([[0, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			group() {
				square(size = [2, 3], center = true);
			}
		}
	}
}