crear 10mil puntitos de diferentes colores

[abimaelrc]

Bueno pues trata así

Código PHP:

<div style="position: relative; width: 500px; height: 500px;">
<?php
$arr = array();
function dontRepeat(&$arr, $value){
    if(in_array($value, $arr)){
        return dontRepeat($arr, (mt_rand(1,500) . '-' . mt_rand(1,500)));
    }
    $arr[] = $value;
    return explode('-', $value);
}
for($i=0; $i<10000; $i++){
    $mtRand = dontRepeat($arr, (mt_rand(1,500) . '-' . mt_rand(1,500)));
    echo '<div style="position: absolute; left: ' . $mtRand[0] . 'px; top: ' . $mtRand[1] . 'px; font-size: 30px;">.</div>';
}
?>
</div>