chest

comp = require("component")
sides = require("sides")
robot = require("robot")
count = 0

function clear()
  robot.use()
  require("os").sleep(2)
  robot.use()
end

function scanChest()
    local inv = comp.inventory_controller.getStackInSlot(sides.front, 1)
    if(inv == nil) then
         return true
    else
        return false
    end
end

function fill()
    robot.turnAround()
    comp.inventory_controller.suckFromSlot(sides.front, 1, 1)
    robot.turnAround()
    comp.inventory_controller.dropIntoSlot(sides.front, 1, 1)
end

function scanFill()
  if scanChest() then
    fill()
  end
end

function colFill()
  for i=1, 3 do
    scanFill()
    robot.up()
  end
end

function nextCol()
  robot.down()
  robot.down()
  robot.down()
  robot.turnLeft()
  robot.forward()
  robot.turnRight()
end

function reset(count)
  robot.turnRight()
  for i=1, count do
    robot.forward()
  end
end

function main()
  clear()
  robot.turnLeft()
  for i=1, 5 do
    colFill()
    nextCol()
    count = count + 1
  end
  reset(count)
end

main()