void OnTriggerEnter2D(Collider2D coll)
{
// If the player comes into contact with the orb...
if (coll.gameObject.layer == LayerMask.NameToLayer("Player"))
{
gameBrain.PlayerPickedUpOrb();
// After sending signal, disable the mesh renderer to make the sphere invisible and then disable this script
meshRenderer.enabled = false;
enabled = false;
}
}