Spawn Random Enemies

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//enemy prefabs to spawn
var Enemy1 : GameObject;
var Enemy2 : GameObject;
var Enemy3 : GameObject;

var spawn1 : Transform;
var spawn2 : Transform;
var spawn3 : Transform;

function spawnEnemies () {

    for(var i=0;i<4;i++) {
        var random1 : int = Random.Range(0,3);

        switch (random1) {
            case (0):
            var spawnEnemy1 = Instantiate(Enemy1);
            switch (i) {
                case (0):
                spawnEnemy1.transform.position = new Vector3(spawn1.transform.position.x, spawn1.transform.position.y, spawn1.transform.position.z);
                spawnEnemy1.transform.tag = "enemy1";
                break;
                case (1):
                spawnEnemy1.transform.position = new Vector3(spawn2.transform.position.x, spawn2.transform.position.y, spawn2.transform.position.z);
                spawnEnemy1.transform.tag = "enemy2";
                break;
                case (2):
                spawnEnemy1.transform.position = new Vector3(spawn3.transform.position.x, spawn3.transform.position.y, spawn3.transform.position.z);
                spawnEnemy1.transform.tag = "enemy3";
                break;
                }
            break;
            case (1):
            var spawnEnemy2 = Instantiate(Enemy2);
                switch (i) {
                case (0):
                spawnEnemy2.transform.position = new Vector3(spawn1.transform.position.x, spawn1.transform.position.y, spawn1.transform.position.z);
                spawnEnemy2.transform.tag = "enemy1";
                break;
                case (1):
                spawnEnemy2.transform.position = new Vector3(spawn2.transform.position.x, spawn2.transform.position.y, spawn2.transform.position.z);
                spawnEnemy2.transform.tag = "enemy2";
                break;
                case (2):
                spawnEnemy2.transform.position = new Vector3(spawn3.transform.position.x, spawn3.transform.position.y, spawn3.transform.position.z);
                spawnEnemy2.transform.tag = "enemy3";
                break;
                }
            break;
            case (2):
            var spawnEnemy3 = Instantiate(Enemy3);
                switch (i) {
                case (0):
                spawnEnemy3.transform.position = new Vector3(spawn1.transform.position.x, spawn1.transform.position.y, spawn1.transform.position.z);
                spawnEnemy3.transform.tag = "enemy1";
                break;
                case (1):
                spawnEnemy3.transform.position = new Vector3(spawn2.transform.position.x, spawn2.transform.position.y, spawn2.transform.position.z);
                spawnEnemy3.transform.tag = "enemy2";
                break;
                case (2):
                spawnEnemy3.transform.position = new Vector3(spawn3.transform.position.x, spawn3.transform.position.y, spawn3.transform.position.z);
                spawnEnemy3.transform.tag = "enemy3";
                break;
                }
            break;

}

}

}