Help with casting and drawing multiple raycast along an angle

hey there,

Like the title says, i want to cast multiple Ray's along an angle. And draw them using a LineRenderer.

I hope someone can help me with this one, i find it pretty hard to come up with a solution. The script is meant for a weapon set in a top down shooter. I am trying to create a variety of weapons each with their own variables.

Some will have 1 bullet trace while others can spread 5 or more on a certain angle.

I tried it doing like this:

                         //this snippet is placed in an IEnumerator : Shoot(int amount, float spreadAngle, int count)
                         //the reason it is a IEnumerator is because some weapons will have a Burst fire type
                         //the AMOUNT variable is set for the amount of bullets fired
                         //SPREADANGLE variable is self explanatory, this will be the angle the bullets will be fired in
                         //COUNT variable is for the Burst function, 1 is just a regular weapon, 3 will have a burst of 3 bullets
                         float perRayAngle = spreadAngle / (amount - 1);     //perRayAngle will evenly spread the Ray's along the angle
                         float startAngle = spreadAngle * -0.5f;
 
                         //I thought maybe using a List will help solve this, but it didn't
                         List<LineRenderer> lines = new List<LineRenderer>(amount);
 
                         
                         for(int i = 0; i < amount; i++)
                         {
                             //couldn't check if the rayAngle was working, since when i pressed the Fire1 button it gave a null reference
                             Vector3 rayAngle = Quaternion.AngleAxis(startAngle+1*perRayAngle,fireTransform.forward) * fireTransform.forward;
 
                             //the Ray values
                             shootRay.origin = fireTransform.position;
                             shootRay.direction = rayAngle;
 
                             //bulletLine is a public LineRenderer, lines[i] will inherit its values
                             lines[i] = bulletLine;
                             //enable lines[i]
                             lines[i].enabled = true;
                             //set the lines[i] starting position to the fireTransform or "Muzzle" position
                             lines[i].SetPosition(0, fireTransform.position);
 
                             //for now i only draw the lines when it is hit, i will change this however
                             if(Physics.Raycast(shootRay, out shootHit, 100f))
                             {
                                 lines[i].SetPosition(1, shootHit.point);
                             }
 
                         }
 
                         //firerate
                         nextFire = Time.time + fireRate;

I thought using a List will help this problem, since the amount of bullets fired change depending on the weapon.

However, it still didn't work. Whenever i press the "Fire1" key, i get a null reference.

So anyway, hope you can give me a few tips on this.

Cheers and thanks in advance, Darryl