Stripmine

tArgs = {...}
Numbers = {}
if #tArgs ~= 2 then
    print("Usage: p <length> <blocks per torch>")
    error()
end
for i=1,tArgs[2] do
    Numbers[i] = tArgs[2] * i
end
for i=1,tArgs[1] do
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    for x=1,#Numbers do
        if i == Numbers[x] then
            turtle.up()
            turtle.dig()
            turtle.down()
            turtle.select(16)
            turtle.placeUp()
            turtle.select(1)
        end
    end
end
turtle.turnLeft()
turtle.turnLeft()
for i=1,tArgs[1] do
    turtle.forward()
end
for i=1,15 do
    turtle.select(i)
    turtle.drop()
end
turtle.select(1)
turtle.turnLeft()
turtle.turnLeft()