THE FIRST NUMBER after newPotion, is the potion ID, for example moveSpeed, is 1.

public static final Potion moveSpeed = (new Potion(1, new ResourceLocation("speed"), false, 8171462)).setPotionName("potion.moveSpeed").setIconIndex(0, 0).registerPotionAttributeModifier(SharedMonsterAttributes.movementSpeed, "91AEAA56-376B-4498-935B-2F7F68070635", 0.20000000298023224D, 2);
    public static final Potion moveSlowdown = (new Potion(2, new ResourceLocation("slowness"), true, 5926017)).setPotionName("potion.moveSlowdown").setIconIndex(1, 0).registerPotionAttributeModifier(SharedMonsterAttributes.movementSpeed, "7107DE5E-7CE8-4030-940E-514C1F160890", -0.15000000596046448D, 2);
    public static final Potion digSpeed = (new Potion(3, new ResourceLocation("haste"), false, 14270531)).setPotionName("potion.digSpeed").setIconIndex(2, 0).setEffectiveness(1.5D);
    public static final Potion digSlowdown = (new Potion(4, new ResourceLocation("mining_fatigue"), true, 4866583)).setPotionName("potion.digSlowDown").setIconIndex(3, 0);
    public static final Potion damageBoost = (new PotionAttackDamage(5, new ResourceLocation("strength"), false, 9643043)).setPotionName("potion.damageBoost").setIconIndex(4, 0).registerPotionAttributeModifier(SharedMonsterAttributes.attackDamage, "648D7064-6A60-4F59-8ABE-C2C23A6DD7A9", 2.5D, 2);
    public static final Potion heal = (new PotionHealth(6, new ResourceLocation("instant_health"), false, 16262179)).setPotionName("potion.heal");
    public static final Potion harm = (new PotionHealth(7, new ResourceLocation("instant_damage"), true, 4393481)).setPotionName("potion.harm");
    public static final Potion jump = (new Potion(8, new ResourceLocation("jump_boost"), false, 2293580)).setPotionName("potion.jump").setIconIndex(2, 1);
    public static final Potion confusion = (new Potion(9, new ResourceLocation("nausea"), true, 5578058)).setPotionName("potion.confusion").setIconIndex(3, 1).setEffectiveness(0.25D);

    /**
     * The regeneration Potion object.
     */
    public static final Potion regeneration = (new Potion(10, new ResourceLocation("regeneration"), false, 13458603)).setPotionName("potion.regeneration").setIconIndex(7, 0).setEffectiveness(0.25D);
    public static final Potion resistance = (new Potion(11, new ResourceLocation("resistance"), false, 10044730)).setPotionName("potion.resistance").setIconIndex(6, 1);

    /**
     * The fire resistance Potion object.
     */
    public static final Potion fireResistance = (new Potion(12, new ResourceLocation("fire_resistance"), false, 14981690)).setPotionName("potion.fireResistance").setIconIndex(7, 1);

    /**
     * The water breathing Potion object.
     */
    public static final Potion waterBreathing = (new Potion(13, new ResourceLocation("water_breathing"), false, 3035801)).setPotionName("potion.waterBreathing").setIconIndex(0, 2);

    /**
     * The invisibility Potion object.
     */
    public static final Potion invisibility = (new Potion(14, new ResourceLocation("invisibility"), false, 8356754)).setPotionName("potion.invisibility").setIconIndex(0, 1);

    /**
     * The blindness Potion object.
     */
    public static final Potion blindness = (new Potion(15, new ResourceLocation("blindness"), true, 2039587)).setPotionName("potion.blindness").setIconIndex(5, 1).setEffectiveness(0.25D);

    /**
     * The night vision Potion object.
     */
    public static final Potion nightVision = (new Potion(16, new ResourceLocation("night_vision"), false, 2039713)).setPotionName("potion.nightVision").setIconIndex(4, 1);

    /**
     * The hunger Potion object.
     */
    public static final Potion hunger = (new Potion(17, new ResourceLocation("hunger"), true, 5797459)).setPotionName("potion.hunger").setIconIndex(1, 1);

    /**
     * The weakness Potion object.
     */
    public static final Potion weakness = (new PotionAttackDamage(18, new ResourceLocation("weakness"), true, 4738376)).setPotionName("potion.weakness").setIconIndex(5, 0).registerPotionAttributeModifier(SharedMonsterAttributes.attackDamage, "22653B89-116E-49DC-9B6B-9971489B5BE5", 2.0D, 0);

    /**
     * The poison Potion object.
     */
    public static final Potion poison = (new Potion(19, new ResourceLocation("poison"), true, 5149489)).setPotionName("potion.poison").setIconIndex(6, 0).setEffectiveness(0.25D);

    /**
     * The wither Potion object.
     */
    public static final Potion wither = (new Potion(20, new ResourceLocation("wither"), true, 3484199)).setPotionName("potion.wither").setIconIndex(1, 2).setEffectiveness(0.25D);

    /**
     * The health boost Potion object.
     */
    public static final Potion healthBoost = (new PotionHealthBoost(21, new ResourceLocation("health_boost"), false, 16284963)).setPotionName("potion.healthBoost").setIconIndex(2, 2).registerPotionAttributeModifier(SharedMonsterAttributes.maxHealth, "5D6F0BA2-1186-46AC-B896-C61C5CEE99CC", 4.0D, 0);

    /**
     * The absorption Potion object.
     */
    public static final Potion absorption = (new PotionAbsorption(22, new ResourceLocation("absorption"), false, 2445989)).setPotionName("potion.absorption").setIconIndex(2, 2);

    /**
     * The saturation Potion object.
     */
    public static final Potion saturation = (new PotionHealth(23, new ResourceLocation("saturation"), false, 16262179)).setPotionName("potion.saturation");