Recon Turtle Loop

--[[
THE RECON TURTLE
----------------
The goal of this program is to use a wireless turtle to 'scout' out
an area using comparison functions everytime it moves.  It uses
remote-control style movement, then runs through a detection loop
which identifies blocks in the surrounding area by comparing them to
blocks in it's own inventory.
]]--


--VARIABLE DELCARATIONS
local inventory = {}
for i=1, 16 do
    inventory[i] = 'block'
end
local userInput = 'nil'
local match = false


--FUNCTION DECLARATIONS

function inputInventory()       --Gathers blocks in inventory w/ names for identification
    shell.run("clear")
    print("         INVENTORY MANAGEMENT         ")
    print("--------------------------------------")
    for slot=1, 16 do
        print("Place a block in slot"..slot..".")
        while turtle.getItemCount(slot) == 0 do
            os.pullEvent("turtle_inventory")
        end
        print("Enter the name of the block:")
        inventory[slot] = read()
        print("ID'd "..inventory[slot].." in slot "..[slot]..".")
    end
end

function compare(side)      --Compares [side] to inventory for identification; returns name if ID'd
    match = false
    if side == "front" then
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compare() then
                    return inventory[slot]
                    match = true
                end
            end
        end
    elseif side == "left" then
        turtle.turnLeft()
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compare() then
                    turtle.turnRight()
                    return inventory[slot]
                    match = true
                end
            end
        end
    elseif side == "right" then
        turtle.turnRight()
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compare() then
                    turtle.turnLeft()
                    return inventory[slot]
                    match = true
                end
            end
        end
    elseif side == "down" then
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compareDown() then
                    return inventory[slot]
                    match = true
                end
            end
        end
    elseif side == "up" then
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compareUp() then
                    return inventory[slot]
                    match = true
                end
            end
        end
    elseif side == "back" then
        turtle.turnRight()
        turtle.turnRight()
        while match == false do
            for slot=1, 16 do
                turtle.select(slot)
                if turtle.compare() then
                    turtle.turnRight()
                    turtle.turnRight()
                    return inventory[slot]
                    match = true
                end
            end
        end
    end
end



--EXECUTION