castle

#declare brickWidth  = 10;
#declare brickHeight = 3.5;
#declare brickLength = 4;

#declare random = seed(1000);

camera
{
    location <50, 50, -10 * 3>
    look_at <0, 0, 0>
}

light_source
{
    <50, 50, -10 * 3>
    color rgb <1, 1, 1>
}

#macro fun(varWidth, varHeight)
    #declare vx = 0;
    #declare vy = 0;

    #while (vx < varWidth)
        #while (vy < varHeight)
            #declare colorOff = 1 - rand(random) / 5;

            box
            {
                <vx * brickWidth, vy * brickHeight, 0>
                <vx * brickWidth + brickWidth, vy * brickHeight + brickHeight, brickLength>

                pigment
                {
                    color rgb <colorOff, colorOff, colorOff>
                }
            }

            #declare vy = vy + 1;
        #end

        #declare vx = vx + 1;
        #declare vy = 0;
    #end
#end

fun(10, 10)