What is wrong with this script? – Basic: Planer four direction moments in set area

Despite my efforts, I cannot get a prim to stay within a square of 10x10m. If anyone can point out my mistakes, which I am sure there are quite a few, I would greatly appreciate it. The script is working sort of. It just does not want to stay within the area I want it to. >_<

vector startingpos;
float momentplus = 1.00;
float momentneg = -1.00;
 float   maxXneg ;
 float   maxXplus ;
 float   maxYneg ;
 float  maxYplus ;
 integer range = 5; // 5x2=10 Range Starting in Center so 5m each way!!!
 integer delay = 2;
 vector currentpos;
  
 integer Random;
 
WEST()
{
    llSetPos(llGetPos() + <momentneg,0.0,0.0>);

}

NORTH()
{
    llSetPos(llGetPos() + <0.0,momentplus,0.0>);
}

EAST()
{
    llSetPos(llGetPos() + <momentplus,0.0,0.0>);
}

SOUTH()
{
    llSetPos(llGetPos() + <0.0,momentneg,0.0>);
}

default
{
state_entry()
{
}
    //on_rez(integer start_param)
    touch_start(integer total_number)
{
    
    startingpos = llGetPos();
    maxXneg = startingpos.x - range;//Moving WEST
    maxXplus = startingpos.x + range;//Moving EAST
    maxYneg = startingpos.y - range;//Moving SOUTH
    maxYplus = startingpos.y + range;//Moving NORTH
    @loop1;
    currentpos = llGetPos();
    Random = (integer)llFrand(4.0)+1;
    llSleep(delay);
 
    
    
    if (Random==1 && (currentpos.x+momentneg)>= maxXneg)
    {
    WEST();//(-)x
}
if (Random==1 && (currentpos.x+momentneg)< maxXneg)
{
EAST();
}


   if (Random==2 && (currentpos.y+momentplus) <= maxYplus)
    {
    NORTH();//(+)y
}
if (Random==2 && (currentpos.y+momentplus) > maxYplus)
{
    SOUTH();
    }



   if (Random==3 && (currentpos.x+momentplus) >= maxXplus)
   {
    EAST();//(+)x
}
if (Random==3 && (currentpos.x+momentplus) < maxXplus)
{
    WEST();
    }


   if (Random==4 && (currentpos.y+momentneg) <= maxYneg) 
   {
    SOUTH();//(-)y
}
if (Random==4 && (currentpos.y+momentneg) > maxYneg)
{
    NORTH();
    }

    jump loop1;
    }
}

This should do it.

if (Random==1 && (currentpos.x+momentneg) >= maxXneg)
{
WEST();//(-)x
}
if (Random==1 && (currentpos.x+momentneg) < maxXneg)
{
EAST();
}


if (Random==2 && (currentpos.y+momentplus) < maxYplus)
{
NORTH();//(+)y
}
if (Random==2 && (currentpos.y+momentplus) >= maxYplus)
{
SOUTH();
}



if (Random==3 && (currentpos.x+momentplus) < maxXplus)
{
EAST();//(+)x
}
if (Random==3 && (currentpos.x+momentplus) >= maxXplus)
{
WEST();
}


if (Random==4 && (currentpos.y+momentneg) >= maxYneg)
{
SOUTH();//(-)y
}
if (Random==4 && (currentpos.y+momentneg) < maxYneg)
{
NORTH();
}

Thank you arton Rotaru! It works perfect now. ^.=.^ Everyone in SL is so helpful and nice!