var stopme = 0;

while(1)
{
effect(p_fountain,maxv(1,40*time_step),vector(0,0,0),vector(0,0,4));
wait(1);
}

while(stopme == 0)
{
effect(p_fountain,maxv(1,40*time_step),vector(0,0,0),vector(0,0,4));
wait(1);
}

switch(key)
{
case 59:
start_particle_while_key(59, vTemp);
break;

case 0: // no key hitten
stopme = 1;
wait(2);
stopme = 0;
break;
}