imtunnel

width = 7
height = 3

function digOneUnit()
    turtle.dig()
    turtle.forward()
    for i=3,height do
        turtle.digUp()
        turtle.up()
    end
    turtle.digUp()
    for i=3,height do
        turtle.down()
    end

    for i=2,width do
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        turtle.turnLeft()
        for j=3,height do
            turtle.digUp()
            turtle.up()
        end
        turtle.digUp()
        for j=3,height do
            turtle.down()
        end
    end

    turtle.turnLeft()
    for i=2,width do
        turtle.forward()
    end
    turtle.turnRight()
end

for h=1,10 do
    turtle.refuel(1)
    digOneUnit()
end

-- GiiNH1ty