$fn=64;

// Parameters
panel_length = 100;
panel_width = 100;
panel_thickness = 3;

rail_width = 4;
rail_height = 8;     // Total height from the bottom of the panel
rail_spacing = 15;   // Distance between rails in a single pair
pair_spacing = 50;   // Distance between the centers of the two pairs

module quarter_panel_with_rails() {
    union() {
        // Main base panel
        translate([-panel_length/2, -panel_width/2, 0])
            cube([panel_length, panel_width, panel_thickness]);

        // Rail Pair 1
        translate([-panel_length/2, -pair_spacing/2 - rail_spacing/2 - rail_width/2, 0])
            cube([panel_length, rail_width, rail_height]);
            
        translate([-panel_length/2, -pair_spacing/2 + rail_spacing/2 - rail_width/2, 0])
            cube([panel_length, rail_width, rail_height]);

        // Rail Pair 2
        translate([-panel_length/2, pair_spacing/2 - rail_spacing/2 - rail_width/2, 0])
            cube([panel_length, rail_width, rail_height]);
            
        translate([-panel_length/2, pair_spacing/2 + rail_spacing/2 - rail_width/2, 0])
            cube([panel_length, rail_width, rail_height]);
    }
}

// Render the object
quarter_panel_with_rails();