set x margin 2;
set x size 8.5*2.54 - 4;
set y size 6;
set x axis 0 1;
set y axis 0 1;
draw axes none;
$s = $_xsize;
set clip on;

# Some hues that look nice:
# 0.10 warm browns and oranges, tending to red
# 0.11 warm browns and golds, tending to green
# 0.60 slightly warm blues
# 0.04 reds

$hue = 0.11;
$saturation = 0.6;
$value = 0.6;
for ($d = 0; $d < 25; $d++) {
        $x = rand();
        $y = rand();
        set color hsv $hue $saturation $value;
        set symbol size $s;
        draw symbol filleddiamond at $x $y;
        set color white;
        draw symbol diamond at $x $y;
        $s *= 0.9;
        $saturation *= 1.1;
        $value *= 1.05;
}