Alright. It's better if you start by posting what you have coded so far (within code tags), together with a rough schematic of your contraption (a photo of a drawing is OK; a photo of your actual thing, less so).
Alright. It's better if you start by posting what you have coded so far (within code tags), together with a rough schematic of your contraption (a photo of a drawing is OK; a photo of your actual thing, less so).