difference()
{
    union()
    {
        base();
    }
    union() //sustraendo
    {
        
        lapices(24);
    }
}

module lapices(cantidade)
{
   for (rotacion = [360/cantidade: 360/cantidade:360])
{
rotate ([20,3,rotacion])translate([50,0,5])cylinder(d = 9, h = 100, $fn = 6);
} 
    
}




module base()
{
scale([1,1,0.5])translate([0,0,17])rotate_extrude(convexity = 10, $fn = 100)
translate([50, 0, 0])
scale([0.7,1,0.5])circle(r = 15, $fn = 100);

rotate_extrude(convexity = 10, $fn = 100)
translate([40, 0, 0])
scale([1,0.5])square(18);
}