shell.run("gen")
HOffset = -2
for x = 1, #O do
    shell.run("refuel 9999")
    turtle.select(1)
    yMax = #O[x]
    for y = 1, yMax do
        h = O[x][y]
        if h > 0 then
            for i = 1, h do
                turtle.up()
                turtle.placeDown()
            end
            turtle.forward()
            for i = 1, h do
                turtle.down()
            end
        elseif h < 0 then
            h = 0 - HOffset
            for i = 1, h do
                turtle.digDown()
                turtle.down()
            end
            for i = 1, h do
                turtle.up()
            end
            turtle.forward()
        elseif h == 0 then
            turtle.forward()
        end
    end
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    for i = 1, yMax do
        turtle.forward()
    end
    turtle.turnRight()
    turtle.turnRight()
end