cs(24,7): error CS1519: Invalid token 'else' in class, struct, or interface member declaration

I am following this tutorial: https://www.youtube.com/watch?v=1QfxdUpVh5I I am also getting this error: "cs(27,2): error CS1513: } expected" This is my first game and I am fairly new to this so please be patient. Here is the code

 {
     public float timeBtwAttack;
     public float startTimeBtwAttack;
         void Update()
     {
        if(timeBtwAttack <= 0)
         {
             if (Input.GetKey(KeyCode.Space))
             {
                 Collider2D[] enemiesToDamage = Physics2D.OverlapCircleAll(attackPos.position, attackRange, whatIsEnemies);
                 for (int i = 0; i < enemiesToDamage.Length; i++)
                 {
                     enemiesToDamage[i].GetComponent<Enemy>().TakeDamage(damage);
                 }
             }
         }
         timeBtwAttack = startTimeBtwAttack;

     } else {


 }