sleep(1)

for y = 1, 10 do
    for x = 1, 10 do
       turtle.forward()
       if ((y-1) * 10   x-1) % 2 == 0 then
           turtle.digDown()
       end
    end
    turtle.forward()
    if y % 2 == 0 then
        turtle.turnRight()
        turtle.forward()
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.forward()
        turtle.turnLeft()
    end
end