digTest

local length = read()
local width = read()

local firstBlock = 1
local secondBlock = 9

for j = 0, width-1, 1 do
    for i = 0, length-1, 1 do
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
        turtle.turnRight()
        turtle.turnRight()
        turtle.select(firstBlock)
        if turtle.getItemCount() == 0 then
            firstBlock = firstBlock + 1
            if firstBlock > 8 then
                firstBlock = 1
                turtle.select(firstBlock)
                if turtle.getItemCount() == 0 then
                    print("waiting for more primary material...")
                end
                while turtle.getItemCount() == 0 do
                    sleep()
                end
            end
        end
        turtle.select(secondBlock)
        if turtle.getItemCount() == 0 then
            secondBlock = secondBlock + 1
            if secondBlock > 16 then
                secondBlock = 9
                turtle.select(secondBlock)
                if turtle.getItemCount() == 0 then
                    print("waiting for more secondary material...")
                end
                while turtle.getItemCount() == 0 do
                    sleep()
                end
            end
        end
        if i == 0 or i == length-1 or j == 0 or j == width-1 then
            turtle.select(firstBlock)
            turtle.place()
        else
            turtle.select(secondBlock)
            turtle.place()
        end
        turtle.turnRight()
        turtle.turnRight()
    end
    if turtle.detect() then
        turtle.dig()
    end
    if j % 2 == 0 then
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
        turtle.forward()
    else
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
        turtle.forward()
    end
end