Hey I have a working bravery bridge It work's by piston's and redstone and redstone repeater's The redstone repeater's make the piston's go one after each other at a certain speed And then goes back At a certain sped 1 after another sorry for bad explination Download to see What i mean It's cool Oh and yay I am using a media fire Link So there is no schematic but i will include a schematic download as well

Additional Notes

I did not invent this But i did make this one