clear

local arg = { ... }
local tool = require'import'
local t = turtle
local long
local larg
local h


if #arg < 1 then
    long, larg, h = 1,1,1
else
    long = tonumber(arg[1])
    larg= tonumber(arg[2])
    h = tonumber(arg[3])
end


function fr(long, h)
    while long>1 do
        turtle.dig()
        tool.fd()
        if h>1 then
            while t.inspectUp() do t.digUp() end
        end
        long = long-1
    end
end


function virage(turn, h)
    --0 turn left, 1 turn right
    if turn == 0 then
            turtle.turnLeft()
            turtle.dig()
            tool.fd()
            if h>1 then
                while t.inspectUp() do t.digUp() end
            end
            turtle.turnLeft()
            turn = 1
        else
            turtle.turnRight()
            turtle.dig()
            tool.fd()
            if h>1 then
                while t.inspectUp() do t.digUp() end
            end
            turtle.turnRight()
            turn = 0
        end
    return turn
end






local turn=1
local nh=0
turtle.dig()
tool.fd()
if h>1 then
    turtle.digUp()
end
repeat
    print(h)
    if nh==0 then
        nh= nh+1
    else
        if h>1 then
            tool.up()
            h = h-1
        end
        if h>1 then
            tool.up()
            h = h-1
        end
    if h>1 then while t.inspectUp() do t.digUp() end end
    end

    l = 0
    nh2 = 0
    while l<larg do
        if nh2==0 then
            nh2=nh2+1
        else
            turn = virage(turn, h)
        end
        tool.needR()
        fr(long, h)
        l =l+1
    end


    turtle.turnLeft()
    turtle.turnLeft()
until h<=2