My terraria mod isnt working

using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Terraria;
using Terraria.ID;
using Terraria.ModLoader;

namespace SwordsMod.NPCs.Bosses
{
    public class Optime : ModNPC
    {
        int attackTimer = 0;
        int spread1timer = 150;
        int spread2timer = 151;
        int rapid1timer = 151;
        int rapid2timer = 151;

        public override void SetStaticDefaults()
        {
            DisplayName.SetDefault("O P T I M E");
            Main.npcFrameCount[npc.type] = Main.npcFrameCount[3];
        }

        public override void SetDefaults()
        {
            npc.width = 78;
            npc.height = 104;
            npc.damage = 999999;
            npc.defense = 8;
            npc.HitSound = SoundID.NPCHit1;
            npc.DeathSound = SoundID.NPCDeath1;
            npc.value = 0f;
            npc.knockBackResist = 0f;
            npc.aiStyle = -1;
            animationType = -1;
            npc.boss = true;
            npc.noGravity = true;
            npc.noTileCollide = true;
            npc.aiStyle = -1;
            npc.lifeMax = Main.expertMode ? 3000 : 5000;

        }
        int useJitterMethod = 1; //set this to 1 for method 1 set it to 2 for method 2
        //variables used for both methods
        Vector2 moveTo;
        float flyDirection;
        //settings for both methods
        float heightAbovePlayer = 200;
        //variables used for jitter method 1

        //settings for jitter method 1
        float acceleration = .8f; // acceleration rate
        float maxSpeed = 7f; //max speed


        //variables used for jitter method 2
        float currentFlyDirection;
        //settings for jitter method 2
        float speed = 12; //how fast it moves
        float rotationSpeed = 20; //rotation speed in degrees per frame
        public override void AI()
        {
            //look at stuff.cs for information on the SlowRotation and PolarVector
            Player player = Main.player[npc.target];
            npc.TargetClosest(true);
            moveTo = new Vector2(player.Center.X, player.Center.Y - heightAbovePlayer);

            flyDirection = (moveTo - npc.Center).ToRotation();

            if (useJitterMethod == 1)//jitter method 1 Acceleration
            {

                npc.velocity = Methods.PolarVector(acceleration, flyDirection);  
                                                                                       
                if (npc.velocity.Length() > maxSpeed)
                {
                    npc.velocity = npc.velocity.SafeNormalize(-Vector2.UnitY) * maxSpeed;
                }
            }

            if (useJitterMethod == 2) //jitter method 2 slowed direction change
            {


                currentFlyDirection = Methods.SlowRotation(currentFlyDirection, flyDirection, rotationSpeed); 
                npc.velocity = Methods.PolarVector(speed, currentFlyDirection); 

            }

            attackTimer++;
            if (attackTimer == 300)
            {
                switch (Main.rand.Next(1, 5))
                {
                    case 1:
                        {
                            spread1timer = 0;
                            break;
                        }
                    case 2:
                        {
                            spread2timer = 0;
                            break;
                        }
                    case 3:
                        {
                            rapid1timer = 0;
                            break;
                        }
                    case 4:
                        {
                            rapid2timer = 0;
                            break;
                        }
                }
                attackTimer = 0;
            }
            spread1timer++;
            if (spread1timer == 30 || spread1timer == 60 || spread1timer == 90 || spread1timer == 120 || spread1timer == 150)
            {
                for (int i = 0; i < 10; i++)
                {
                    float Speed = 12f;
                    int type = mod.ProjectileType("Happfiier");
                    float rotation = ((((float)Math.PI / 5) * i) + (float)Math.Atan2(npc.Center.Y - 10, npc.Center.X - 10));
                    int proj = Projectile.NewProjectile(npc.Center.X, npc.Center.Y, (float)((Math.Cos(rotation) * Speed) * -1), (float)((Math.Sin(rotation) * Speed) * -1), type, 999999, 0f, 0);
                    Main.projectile[proj].tileCollide = false;
                }
            }
        }
        public override void FindFrame(int frameHeight)
        {
            npc.spriteDirection = 0;
            npc.rotation = 0;
            npc.spriteDirection = npc.direction;
            npc.frameCounter++;
            if (npc.frameCounter >= 8) // ticks per frame
            {
                npc.frame.Y = (npc.frame.Y / frameHeight + 1) % Main.npcFrameCount[npc.type] * 104;
                npc.frameCounter = 0;
            }
        }
    }
}