DIY 20 Dollar PDF document page turner

So I’ve been learning to play the accordion lately and I'm now at the point where I can read accordion sheet music arrangements fairly well. There are definitely some nuances with the notation to get used to. Also, it's just not that easy to turn your sheet music with the instrument between you and the music stand. I like reading digital music on my tablet, but it still feels clumsy to swipe the page and get reacclimated all in time. WTH… these accordion arrangements can have a lot of pages! If you're using PDF documents here's an easy, cheap way to make a Bluetooth enabled footpad to go forward and backward in your music.