Building Builder

--House builder
--Logan Eastman

local length = 5; --Internal length of building
local width = 7; --Internal width of building
local height = 1; --Internal height; does not include ceiling


local itemSlot = 1;
local fuelSlot = 16;

function checkResources()
    --Check fuel
    local fuelThreshold = 2
    if(turtle.getFuelLevel() < fuelThreshold) then
        if(turtle.getItemCount(fuelSlot)>0) then
            turtle.select(fuelSlot)
            turtle.refuel(1)
            turtle.select(itemSlot)
        end
    end

    --Check Items
    if(turtle.getItemCount(itemSlot) == 0) then
        if((itemSlot+1) ~= fuelSlot) then
            itemSlot = itemSlot+1
            if(itemSlot >= 16) then
                if(fuelSlot ~= 1) then
                    itemSlot = 1
                else
                    itemSlot = 2
                end
            end
            turtle.select(itemSlot)
        else
            if(fuelSlot == 16) then
                itemSlot = 1
            else
                itemSlot = itemSlot + 2
            end
            turtle.select(itemSlot)
        end


        if(turtle.getItemCount(itemSlot) == 0) then
            print "All out of items"
        end
    end
end

function buildWalls()
    for floor = 1,height,1 do --Loop for every block height of building
        checkResources()
        turtle.up() --Move up

        for i = 1,2,1 do --repeat twice per block height
            for side = 0,length,1 do --Forward for length
                checkResources()
                turtle.placeDown() --Place blocks
                turtle.forward() --Move forward
            end

            turtle.turnLeft()


            for side = 0,width,1 do --forward for width
                checkResources()
                turtle.placeDown() --place blocks
                turtle.forward() --Move forward
            end

            turtle.turnLeft()

        end
    end
end

function buildCeiling()
    local rightTurn = true
    checkResources()
    turtle.up()
    for w = 0,width+1,1 do --Loop for every block height of building

        if(rightTurn) then --switch rightTurn toggle
            rightTurn = false
        else
            rightTurn = true
        end

        for side = 0,length,1 do --Forward for length
            checkResources()
            turtle.placeDown() --Place blocks
            turtle.forward() --Move forward
        end

        if(rightTurn) then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end

        turtle.placeDown() --Place block before moving
        checkResources()
        turtle.forward() --Move forward

        if(rightTurn) then
            turtle.turnRight()
        else
            turtle.turnLeft()
        end
    end
end

buildWalls()
buildCeiling()