$bt = mt_rand($cmin_t,$cmax_t);
/** set array element as hex string with hashmark (for HTML output) **/
-for ($i = 0; $i <= 14; $i++) {
+for ($i = 0; $i <= 15; $i++) {
if ($i == 0 or $i == 3 or $i == 4 or $i == 5 or $i == 9 or $i == 10 or $i == 12) {
$color[$i] = sprintf("#%02X%02X%02X",$rb,$gb,$bb);
} else {