antiblock

for i = 1,3 do
    turtle.down()
        for a = 1,3 do
            for b = 1,2 do
                turtle.digDown()
                turtle.forward()
            end
            turtle.digDown()
            turtle.back()
            turtle.back()
            turtle.turnRight()
            turtle.forward()
            turtle.turnLeft()
        end
    turtle.turnLeft()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.turnRight()
end