draw open/close script

ok, i got the basics of this script, but when i link scripted object to a non scripted object it won't work, can anyone help me out here.

integer x = 0;
default
{
state_entry()
{
llSetStatus(STATUS_BLOCK_GRAB, TRUE);

}

touch_start (integer t)
{
if (x == 0)
{
llSetPos(llGetPos()+<0,1,0>;
x = 1;
}
else
{
llSetPos(llGetPos()+<0,-1,0>;
x = 0;
}
}
}

Try this tip from the llSetPos() wiki entry:

Q: Shouldn't this be:
llSetPos(llGetPos() + <0, 0, 1>?
A: No, not for child prims -- their position is always relative to the parent. If you want to move it relative to its current offset from the parent, you'd use:
llSetPos(llGetLocalPos() + <0, 0, 1>;.