void Shoot()
        {
            if (currentBullets <= 0)
            {
                return;
            }

            currentBullets--;
            ammoSlider.value = currentBullets;

            // Reset the timer.
            timer = 0f;

            // Play the gun shot audioclip.
            gunAudio.Play();

            // Enable the lights.
            gunLight.enabled  = true;
            faceLight.enabled = true;

            // Stop the particles from playing if they were, then start the particles.
            gunParticles.Stop();
            gunParticles.Play();

            // Enable the line renderer and set it's first position to be the end of the gun.
            gunLine.enabled = true;
            gunLine.SetPosition(0, transform.position);

            // Set the shootRay so that it starts at the end of the gun and points forward from the barrel.
            shootRay.origin    = transform.position;
            shootRay.direction = transform.forward;

            // Perform the raycast against gameobjects on the shootable layer and if it hits something...
            if (Physics.Raycast(shootRay, out shootHit, range, shootableMask))
            {
                // Try and find an EnemyHealth script on the gameobject hit.
                EnemyHealth enemyHealth = shootHit.collider.GetComponent <EnemyHealth>();

                // If the EnemyHealth component exist...
                if (enemyHealth != null)
                {
                    // ... the enemy should take damage.
                    enemyHealth.TakeDamage(damagePerShot, shootHit.point);
                    enemyImage.enabled = true;
                    enemyImage.sprite  = enemyHealth.icon;
                    enemyHealthSlider.gameObject.SetActive(true);
                    enemyHealthSlider.value = enemyHealth.GetHealthPercentage();
                    StopCoroutine(ScheduleHideEnemyUI());
                    StartCoroutine(ScheduleHideEnemyUI());
                }
                else
                {
                    HideEnemyUI();
                }

                // Set the second position of the line renderer to the point the raycast hit.
                gunLine.SetPosition(1, shootHit.point);
            }
            // If the raycast didn't hit anything on the shootable layer...
            else
            {
                // ... set the second position of the line renderer to the fullest extent of the gun's range.
                gunLine.SetPosition(1, shootRay.origin + shootRay.direction * range);
            }
        }