IEnumerator SpawnWaves()
    {
        yield return new WaitForSeconds(startWait);
        while (true)
        {
            for (int i = 0; i != hazardCount; ++i)
            {
                Vector3 spawnPosition = new Vector3(Random.Range(-spawnValue.x, spawnValue.x), spawnValue.y, spawnValue.z);
                Quaternion spawnRotation = Quaternion.identity;
                Instantiate(hazard, spawnPosition, spawnRotation);
                yield return new WaitForSeconds(spawnWait);
            }
            yield return new WaitForSeconds(waveWait);
        }
    }