porfis
Espero que esto te ayude
http://desarrollocreativo.weebly.com/iluminacioacuten-baacutesica.html (http://desarrollocreativo.weebly.com/iluminacioacuten-baacutesica.html)
https://www.youtube.com/watch?v=_b39Jzi30WU (https://www.youtube.com/watch?v=_b39Jzi30WU)