function scr_screenshake_battle() //gml_Script_scr_screenshake_battle
{
    instance_destroy(obj_screenshake_battle)
    var screenshake = instance_create(0, 0, obj_screenshake_battle)
    battle_screenshake_duration = argument[0]
    battle_screenshake_intensity = argument[1]
    battle_screenshake_dec = battle_screenshake_intensity / battle_screenshake_duration
}