Coin Genration Algorithm in Runner Game

I'm making a runner game sequel like subway surfer. Here are the following mechanics I've done:

• Platform Generation

• Enemy Generation

• Power up Generation

• Point Generation

  Out of these I have problem in generating points algorithm. I have a vision of having points like Subway Surfer game. And right now I was just able to put them randomly on the lanes. Here is my code for Random distribution in lanes.

public void PositionCoins(Vector3 position) { int maxZ = (int)position.z + 17; int minZ = (int)position.z - 59; for(int i = 0;i < coinList.Count;i++) { int randomZ = Random.Range(minZ,maxZ);

         int randomLane = Random.Range(1,5);
         int lane;
         if(!coinList[i].activeInHierarchy)
         {
             if(randomLane == 1)
             {
                 coinList[i].transform.position = new Vector3(-1.35f,1.2f,randomZ);
             }
             else if(randomLane == 2)
             {
                 coinList[i].transform.position = new Vector3(0.05f,1.2f, randomZ);
             }
             else if(randomLane == 3)
             {
                 coinList[i].transform.position = new Vector3(1.45f,1.2f, randomZ);
             }
             else if(randomLane == 4)
             {
                 coinList[i].transform.position = new Vector3(2.85f,1.2f, randomZ);
             }

             coinList[i].SetActive(true);
         }
     }
 }

Now what I want is coins like Subway Surfer randomly distributed in a group of 4-5 coins, equally spaced. Any help is appreciated.