include <ng_common/hollow_cylinder.scad>;

// first row (1mm outer)
translate([0,0,0]) {
    rotate([0,0,0])
        hollowCylinder(0.6, 1, 5);
}

translate([4,0,0]) {
    rotate([0,0,0])
        hollowCylinder(0.5, 1, 5);
}

translate([8,0,0]) {
    rotate([0,0,0])
        hollowCylinder(0.4, 1, 5);
}

translate([12,0,0]) {
    rotate([0,0,0])
        hollowCylinder(0.3, 1, 5);
}

// second row (1.5mm outer)
translate([0,4,0]) {
    rotate([0,0,0])
        hollowCylinder(0.6, 1.5, 5);
}

translate([4,4,0]) {
    rotate([0,0,0])
        hollowCylinder(0.5, 1.5, 5);
}

translate([8,4,0]) {
    rotate([0,0,0])
        hollowCylinder(0.4, 1.5, 5);
}

translate([12,4,0]) {
    rotate([0,0,0])
        hollowCylinder(0.3, 1.5, 5);
}

// third row (2mm outer, inner increasing)
translate([0,8,0]) {
    rotate([0,0,0])
        hollowCylinder(0.6, 2, 5);
}

translate([4,8,0]) {
    rotate([0,0,0])
        hollowCylinder(0.7, 2, 5);
}

translate([8,8,0]) {
    rotate([0,0,0])
        hollowCylinder(0.8, 2, 5);
}

translate([12,8,0]) {
    rotate([0,0,0])
        hollowCylinder(0.9, 2, 5);
}