group() {
	group() {
		difference() {
			multmatrix([[1, 0, 0, -35], [0, 1, 0, -35], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				intersection() {
					union() {
						difference() {
							square(size = [100, 100], center = true);
							square(size = [50, 50], center = true);
						}
						multmatrix([[1, 0, 0, 50], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
							square(size = [15, 15], center = true);
						}
					}
					multmatrix([[0.70710678118, -0.70710678118, 0, 0], [0.70710678118, 0.70710678118, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
						multmatrix([[1, 0, 0, 0], [0, 1, 0, -15], [0, 0, 1, 0], [0, 0, 0, 1]]) {
							square(size = [100, 30], center = false);
						}
					}
				}
			}
			multmatrix([[0.70710678118, 0.70710678118, 0, 0], [-0.70710678118, 0.70710678118, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
				multmatrix([[0.7, 0, 0, 0], [0, 1.3, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
					circle($fn = 0, $fa = 12, $fs = 2, r = 5);
				}
			}
		}
		import(file = "example009.dxf", layer = "body", origin = [0, 0], scale = 2, convexity = 6, $fn = 0, $fa = 12, $fs = 2);
	}
}