clear.lua

function overPlateP()
   return turtle.compareDown()
end

function processMining()
   return turtle.digDown()
end

function maneuverNext(Turns)
   if (Turns == 4) then
      return false
   elseif not turtle.forward() then      
      turtle.turnRight()
      return maneuverNext(Turns+1)
   elseif not overPlateP() then
      turtle.back()
      turtle.turnRight()
      return maneuverNext(Turns+1)
   else
      return mainMine()
   end
end


function mainMine()
   if overPlateP() then
      if processMining() then
         return mainMine()
      else
    return false
      end
   else
      return maneuverNext(0)
   end
end

mainMine()