//moveWrap(xwrap, ywrap)
if (argument0)
{
    if (x < 0)
        x += room_width;
    else if (x > room_width)
        x -= room_width;
}
if (argument1)
{
    if (y < 0)
        y += room_height;
    else if (y > room_height)
        y -= room_height;
}