col -= 1;
if (col == 0 && global.interact == 1)
{
    global.interact = 0;
    obj_mainchara.vspeed = 0;
}
if (col > 0)
{
    obj_mainchara.x = x;
    if (x > (room_width / 2))
        obj_mainchara.y -= 4;
    else
        obj_mainchara.y += 4;
}