if (init == 0)
{
    if (issolid)
        mysolid = instance_create(x, y, obj_solidblock);
    init = 1;
}
if (issolid)
{
    mysolid.x = x;
    mysolid.y = y;
    mysolid.mask_index = mask_index;
    mysolid.image_xscale = image_xscale;
    mysolid.image_yscale = image_yscale;
    mysolid.image_angle = image_angle;
}