i found a script a script on the internet to aim down the sights of a gun but i cant get it to work

hi i am new to scripting and unity so i went on the internet to find a script to aim for my fps it was:

              #pragma strict

function Update () {

if(Input.GetMouseButtonDown(1))
{
 transform.localPossion = Vector3(0,0,0) ;
}

if(Input.GetMouseButtonUp(1))
{
 transform.localPossion = vector3((1.25,0.19,1.5600) ;

but it came up Assets/Scripts/Aim.js(13,1): BCE0044: expecting }, found ".
Please help me.

If that is the whole script then there are missing closing curly braces and the set for “localPosition” is misspelt.

 #pragma strict
function Update () {
 if(Input.GetMouseButtonDown(1))
 {
  transform.localPosition = Vector3(0,0,0); // spelling, it's "localPosition"
 }

 if(Input.GetMouseButtonUp(1))
 {
  transform.localPosition = Vector3(1.25,0.19,1.5600) ; // spelling, it's "localPosition" and Vector should have a capital "V". You should also have matching parenthesis, Vector3 had one to many
 } // missing to close the if mouse button 1 statement
}// missing to close the Update function