right angle curve Gen Thing

int $segments=20;
int $i=0;
float $xCoord=0;
float $yCoord=0;
float $zCoord=0;
int $direction;
string $curveName=`curve -d 1 -p 0 0 0`;
for ($i=0;$i<$segments;$i++)
{
$direction=rand(0,3);
if ($direction==0)
$xCoord+=rand(-30,30);
else if($direction==1)
$yCoord+=rand(-30,30);
else if($direction==2)
$zCoord+=rand(-30,30);

curve -d 1 -a -p $xCoord $yCoord $zCoord $curveName;

}