// create some entity
local hEntity = Entities.CreateByClassname("info_target");
// create its script scope
local tEntityScope = hEntity.GetOrCreatePrivateScriptScope();
tEntityScope.MoveUp <- function (fUnits)
{
    // When this function executes, we're within the entity's script scope.
    local vOrigin = self.GetOrigin();
    vOrigin.y = vOrigin.y + fUnits;
    self.SetOrigin(vOrigin);
}
// vOrigin no longer exists here, because it's local to the bracket above
// However, tEntityScope still exists
tEntityScope.MoveUp(10.0);