gzz.c = (0,200); % The central thing.
gzz.control.c = (0,-50); % In the lower cup

vertically(20, cen, gzz, gzz.media, gzz.diff);


gzz.client.e = gzz.w + (-50,-50);
gzz.impl.w = gzz.e + (60,-40);

gzz.mediaserver.storage.c = gzz.mediaserver.c + (0,-50);

gzz.mediaserver.storage.w = (200,-30);

gzz.media.impl.c = gzz.mediaserver.c + (0,50);

gzz.slices.c = gzz.impl.c + (0,-100);

gzz.zzutil.c = gzz.c + (-100,0);


vertically(25, cli, gzz.client.gl, gzz.client.awt);

centeroffs((20,-20), glib, libglpaper, libgummi, libshaders, libcallgl);
glib.c = gzz.gfx.gl.c + (0,-80);

cli.c = gzz.client.w + (-50,-50);
gzz.gfx.gl.c = gzz.client.gl.c + (-100,-30);


gzz.vob.c = gzz.client.c + (0,-140);

begingroup;

    color clcolor, scolor;
    scolor = (.7,.8,1);
    clcolor = (1,.7,.7);
    save defaultpen, defaultscale;
    defaultscale = 5;
    pen defaultpen;
    defaultpen = pencircle scaled 10pt;

    draw (80,220)..(20,100)..(0,0) withcolor scolor withpen defaultpen;
    draw (-80,220)..(-20,100)..(0,0) withcolor clcolor withpen defaultpen;

    draw (-80,-80){up}..(0,0)..(80,-80) withcolor (0.8,1,0.8) withpen defaultpen;

    draw thelabel.lft("frontend", (-120, 200)) withcolor clcolor;
    draw thelabel.rt("backend", (120, 200)) withcolor scolor;

endgroup;