Bukkit launchpad help - Detect blocks below player

Hey everyone! I'm trying to develop a simple launchpad plugin for a small server, but im really stuck! Im trying to detect if the player is standing on chiselled quartz block, and then detect if a redstone block is below that (i've got a lot of chiselled quartz in the lobby, so making sure a redstone block is below it is really important).
Thanks -loz

 

What have you got so far? What are you stuck on?

 

well, i can launch the player with a command, but i want to detect the blocks below instead

 

@jumbledProgram You can listen to the PlayerMoveEvent, then check if PlayerMoveEvent#getTo()#getBlock()#getRelative(BlockFace#DOWN)#getType() is your required Material.

Do note that unless you make another check, this will run a lot of times, causing the player to be launched much further.