// -*- C -*-

h=5;

$fa=1;
$fs=0.1;

difference(){
  cube([50,10,h], center=true);
  for (i=[0:2:10]) {

    sz = 4 + i/10;

    echo(sz);
    translate([(i-5)/2 * 7, 0, -7 ])
      cylinder(r= sz/2, h=14);
  }
}