How do you cross the trick in 4th gym in Pokemon diamond?

Answer 1

ok first you go straight then take a left and go on the yellow switch then you go straight and go down the steps and take a right then go straight then go left then straightand go up the stairs then step on the green switchthen go down the first steps and take a right then go down then left then go up the stairs and step on the blue switch then go left then down then go right then up and go on the green switch then go right and all the way down till you see a yellow switch and stand on that then go up left then downthen go up the stairs and stand on the blue switchand your at the gym leader.