Particle circle HELP

I use c sharp but I wanted to use the code from http://www.smokymonkeys.com/kyrill/ I converted java to c# and I don't understand how get rid of these few errors, can you guy take a look and see what might be causing them?

  using UnityEngine; using System.Collections;
 [ExecuteInEditMode]
 
 public class rings : MonoBehaviour {
 bool emit = true;
 float range = 1.0f;
 int particleCount = 16;
 float particleSize = 1.0f;
 float rotationSpeed = 0.5f;
 Color particleColor = Color.white;
 LayerMask layerMask = -1;
 float castMaxDistance = Mathf.Infinity;
 
 private int oldParticleCount; private ParticleEmitter emitter; private Particle[] particles;
 
 private float rot;
 
 private Vector3 center; private Vector3 pos; private RaycastHit hit;
 
 private Transform myTransform;
 
  
     
 void Awake (){
 emitter = gameObject.GetComponent();
 if (!emitter) {
             
 gameObject.AddComponent<EllipsoidParticleEmitter>();
 emitter = gameObject.GetComponent();
 } 
 emitter.emit = false;
 emitter.ClearParticles();
 emitter.useWorldSpace = true;
 createParticlesAry();
 
 myTransform = transform;
 }
 
 private void createParticlesAry (){
 if (particleCount < 0) {particleCount = 0;
 } 
 particles = new Particle[particleCount];
 oldParticleCount = particleCount;
     }
 
 private void setParticlesCount (){
 if (!particles || (oldParticleCount != particleCount)){
             createParticlesAry(); } }
 
 void Update (){
 setParticlesCount();
 emitter.ClearParticles();
 
 if (emit) {
     int i;
     float radian;
     float offsetY;
     Vector3 center;
     Vector3 pos;
     RaycastHit hit;
             
     center = myTransform.position;
     rot += Time.deltaTime *rotationSpeed;
     offsetY = particleSize /2;
     for (i = 0; i < particleCount; i++) {
         radian = Mathf.PI *(i /(particleCount *0.5f)) +rot;
         pos.x = range *Mathf.Cos(radian) +center.x;
         pos.y = center.y;
         pos.z = range *Mathf.Sin(radian) +center.z;
         if (Physics.Raycast(pos, -myTransform.up, out hit, castMaxDistance, layerMask)) {
             pos.y = hit.point.y +offsetY;
         }
         Debug.DrawRay(pos, myTransform.up *hit.distance, Color.red);
 
         particles[i].position = pos;
         particles[i].color = particleColor;
         particles[i].size = particleSize;
         particles[i].energy = 1.0f;
         particles[i].velocity = myTransform.up;
     }
 
     emitter.particles = particles;
 }
 }
 }

The errors that im getting are:

Assets/rings.cs(25,22): error CS0411: The type arguments for method UnityEngine.GameObject.GetComponent<T>()' cannot be inferred from the usage. Try specifying the type arguments explicitly > Assets/rings.cs(28,25): error CS0246: The type or namespace name EllipsoidParticleEmitter' could not be found. Are you missing a using directive or an assembly reference?

Assets/rings.cs(29,22): error CS0411: The type arguments for method UnityEngine.GameObject.GetComponent<T>()' cannot be inferred from the usage. Try specifying the type arguments explicitly > Assets/rings.cs(47,5): error CS1955: The member rings.particles' cannot be used as method or delegate

Please help