if (room == room_field_checkers1_ch1)
{
    if (timer >= 900)
    {
        instance_create_ch1(1202, 240, obj_ob_checkertile_ch1);
        instance_create_ch1(1242, 280, obj_ob_checkertile_ch1);
        instance_create_ch1(1282, 320, obj_ob_checkertile_ch1);
        instance_create_ch1(962, 240, obj_ob_checkertile_ch1);
        instance_create_ch1(1002, 280, obj_ob_checkertile_ch1);
        instance_create_ch1(1042, 320, obj_ob_checkertile_ch1);
        instance_create_ch1(722, 240, obj_ob_checkertile_ch1);
        instance_create_ch1(762, 280, obj_ob_checkertile_ch1);
        instance_create_ch1(802, 320, obj_ob_checkertile_ch1);
    }
    if (obj_mainchara_ch1.x >= 4000 && obj_mainchara_ch1.x <= 1620)
        obj_mainchara_ch1.battlemode = 1;
    else
        obj_mainchara_ch1.battlemode = 0;
    if (global.interact == 0)
        timer += 1;
    if (timer >= 40)
    {
        timer = 0;
        ch = con * 40;
        instance_create_ch1(1442 - ch, 240 + ch, obj_ob_checkertile_ch1);
        con += 1;
        if (con > 2)
            con = 0;
    }
}
if (whitetimer >= 20 && whitecon == 1)
{
    xdiff = obj_mainchara_ch1.x - 340;
    obj_mainchara_ch1.x = 340;
    if (instance_exists(global.cinstance[0]))
    {
        global.cinstance[0].x -= xdiff;
        for (i = 25; i >= 0; i -= 1)
            global.cinstance[0].remx[i] -= xdiff;
    }
    if (instance_exists(global.cinstance[1]))
    {
        global.cinstance[1].x -= xdiff;
        for (i = 25; i >= 0; i -= 1)
            global.cinstance[1].remx[i] -= xdiff;
    }
    whitecon = 2;
}
if (room == room_field_checkers4_ch1 || room == room_field_checkers6_ch1)
{
    if (obj_mainchara_ch1.x >= 4000 && obj_mainchara_ch1.x <= 1620)
        obj_mainchara_ch1.battlemode = 1;
    else
        obj_mainchara_ch1.battlemode = 0;
}