mine controller

-- mine drone controller

rednet.close("right")
rednet.open("right")

print("start digging at X = ")
local xDig = read() -- 494
print("start digging at Z = ")
local zDig = read() -- 1140
print("drop stuff at X = ")
local xDrop = read() -- 487
print("drop stuff at Y = ")
local yDrop = read() -- 64
print("drop stuff at Z = ")
local zDrop = read() -- 1121
print("drop stuff at F = ")
local fDrop = read() -- 3
print("how many digs in X direction?")
local maxX = read()
print("how many digs in Z direction?")
local maxZ = read()
maxX = maxX - 1
maxZ = maxZ - 1
local args = {xDig, zDig, xDrop, yDrop, zDrop, fDrop}

local waitList = {}

--local digSpots = {{0,0},{2,1},{4,2},{3,4},{1,3}}

for X = 0,maxX do
    args[1] = xDig + X * 5
    for Z = 0,maxZ do
        args[2] = zDig + Z * 5
        msg = ""
        print("mine controller ready, next spot will be "..args[1].." "..args[2])
        repeat
            id, msg, _ = rednet.receive()
        until msg == "drone ready"
        if msg == "drone ready" then
            print("drone "..id.." reports in, sending job at "..args[1].." "..args[2])
            local curId = id
            rednet.send(id, "mine at")
            for i = 1,6 do
                id, msg, _ = rednet.receive()
                if (id == curId) and msg == "ack" then
                    rednet.send(id, tostring(args[i]))
                else
                    rednet.send(id, "wait")
                    i = i - 1
                end
            end
        end
        id, msg, _ = rednet.receive()
    end
end