board_x = 5;
board_y = 5;
board_z = 0;
board_length = 300;
board_width = 300;
board_height = 20;

cell_size = board_length / 10;// it's equal to car width/length(will be fine if car be quadrat)

quadrants = [
// Part 1
    [board_x+cell_size, board_y+cell_size],                                 
// Part 2
    [board_x+cell_size + board_length/2, board_y+cell_size],                
// Part 3
    [board_x+cell_size, board_y+cell_size + board_width/2],                
// Part 4    
    [board_x+cell_size + board_length/2, board_y+cell_size + board_width/2] 
];

for (q = quadrants) {
    q_start_x = q[0];
    q_start_y = q[1];
    
    q_end_x = q_start_x + board_length/2 - cell_size;
    q_end_y = q_start_y + board_width/2 - cell_size;

    echo(str("Drawing maze in quadrant starting at: ", q_start_x, ",", q_start_y));

    // We step by 'cell_size'
    for (x = [q_start_x : cell_size : q_end_x - cell_size]) {
        for (y = [q_start_y : cell_size : q_end_y - cell_size]) {
            
            translate([x, y, 0]) {
                // For example: a random wall or a pillar
                draw_maze_cell(cell_size);
            }
        }
    }
}


module board(x, y, z, length, width, height) {
   difference() { 
        translate([x, y, z]) 
            color("#472d02ad") 
            cube([length, width, height]);
        translate([x+1, y+1, z+4])
            color("orange") 
            cube([length-2, width-2, height]);
   };
}

module draw_maze_cell(size) {
    //  random wall
    if (rands(0, 10, 1)[0] > 5) {
        color("red")
       cube([size, 2, board_height - 10]); // horizontal wall
    } else {
        color("red")
        cube([2, size, board_height - 10]); // vertical wall
    }
}


module set_board_nets(x, y, z, length, width, height) {
    for(i = [board_x + cell_size : cell_size/2 : (board_length)]) {
        for(j = [board_y + cell_size : cell_size/2 : board_width]){
                translate([i, j, 2])
                    cube([2, 2, 3]);
        }
    }
}

difference() {
    board(board_x, board_y, board_z, board_length+2, board_width+2, board_height);   
    set_board_nets(board_x+2, board_y, board_z-1, board_length+     2, board_width+2, board_height);
}