Platform Craft

-- Minecraft Sky Factory 2 platforms Builder.
-- Requires:
-- Slot 1,15 Resources
-- Slot 16, Coal
-- Name your turtle by using the cmd : label set turtle
-- this turtle builds form left to right
-- place turtle on block next to the platform that you wanna build

local Moveto ="r"
local NextSlot
local lastslotValid=1
local ResourcesAmount=1
local width
local length
turtle.select(1)
turtle.back()
local function NextSelect()
    for i = lastslotValid, 15 do
        turtle.select(i)
            itemCount = turtle.getItemCount(i)
            if itemCount ~= 0 then
                NextSlot=i
                lastslotValid=i
                ResourcesAmount=1
                break
            else
                lastslotValid=i
                NextSlot=i
                ResourcesAmount=0
            end
         end
end

function MoveBack()
NextSelect()
turtle.select(NextSlot)
turtle.back()
turtle.place()
end
function MoveIt()
NextSelect()
turtle.select(NextSlot)
turtle.turnLeft()
turtle.back()
turtle.down()
end
function MoveItleft()
NextSelect()
turtle.select(NextSlot)
turtle.turnRight()
turtle.back()
turtle.place()
turtle.turnRight()
end
function MoveItRight()
NextSelect()
turtle.select(NextSlot)
turtle.turnLeft()
turtle.back()
turtle.place()
turtle.turnLeft()
end

local function GetResources()
local OneSlotFull
        for i = 1, 15 do
            turtle.select(i)
            itemCount = turtle.getItemCount(i)
            if itemCount ~= 0 then
                OneSlotFull=true
            end

        end
        if OneSlotFull then
        return true
        else
        print("No Resources feed Me ")
        return false
        end
end

local function TurtleReFuel()
        for i = 1, 16 do
         turtle.select(i)
        if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 1 then
        turtle.refuel()
        end
        end
        turtle.select(1)
        if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 1 then
        print("your turtle needs fuel to move put some into last slot")
        return false
        else
        return true
        end
end

function  backtoYou(l,w)
if width%2==0  then
        turtle.up()
        turtle.forward()
        turtle.turnRight()
            for i=1,width do
                turtle.forward()
            end
else
        turtle.up()
        turtle.turnLeft()
        turtle.turnLeft()
            for i=1,length do
                  turtle.forward()
             end

             turtle.turnRight()
             for i=1,width do
                turtle.forward()
            end

end
end

print ("Enter the length:")
local inputL = read()
while tonumber(inputL) == nil or tonumber(inputL) < 1 do
print("You incorrectly enter the length . must be sup then 1.")
write ("Enter the  length :")
inputL = read()
end
length = tonumber(inputL)

print ("Enter the width:")
local inputW = read()
while tonumber(inputW) == nil or tonumber(inputW) < 1 do
print("You incorrectly enter the width . must be sup then 1.")
write("Enter the  width :")
inputW = read()
end
width = tonumber(inputW)

if  GetResources() and TurtleReFuel() then
    MoveIt()
    for j=1,width do
        for i=1,length-1 do
                MoveBack()
                    while ResourcesAmount==0 do
                        print("add more resources to continue! y/n")
                        local ans = read()
                            if ans=="y" then
                                lastslotValid=1
                                NextSelect()
                                elseif ans=="n" then
                                print("Goodbye")
                                return
                            end
                            turtle.place()
                            i=i-1
                    end
        end
        if Moveto =="r"  then
            MoveItleft()
            else
            MoveItRight()
        end
        if Moveto =="r"  then
            Moveto = "l"
            else
            Moveto = "r"
        end
    end
    backtoYou()

end