place item

local succes = false
local oldSlot = turtle.getSelectedSlot()

--Checks for a specific item in current slot and returns succes
local function checkItem(name)
        if turtle.getItemDetail() ~= nil then
                local data = turtle.getItemDetail()
                if data.name == name then
                        return true
                else
                        return false
                end
        end
        return false
end

--check if item is in inventory and returns succes
function checkInvetory(name)
        oldSlot = turtle.getSelectedSlot()
        for i = 1,16 do
            turtle.select(i)
            if checkItem(name) then
                turtle.select(oldSlot)
                return true
            end
        end
        turtle.select(oldSlot)
        return false
end

--check if item is in inventory and returns numberSlot
function checkInventorySlot(name)
        oldSlot = turtle.getSelectedSlot()
        for i = 1,16 do
            turtle.select(i)
            if checkItem(name) then
                turtle.select(oldSlot)
                return i
            end
        end
        turtle.select(oldSlot)
        return nil
end

--move "amount(int)" of "name(string)" items to slot "slot(int)" and returns succes
function placeItemInSlot(name, slot, amount)
    if type(name) ~= string or type(slot) ~= number or type(amount) ~= number then
        return false
    else
        numberSlot = placer.checkInventorySlot(name)
        if numberSlot == nil then
            return false
        else
            turtle.select(numberSlot)
            if turtle.transferTo(slot, amount) then
                local succeeded = true
            else
                local succeeded = false
            end
            turtle.select(oldSlot)
            return succeeded
        end
    end
end

--places any item in any direction and returns succes
function place(name ,dir)
        succes = false
        for i = 1,16 do
            turtle.select(i)
            if checkItem(name) then
                succes = true
            end
        end
        if succes then
                if dir == "up" then
                        return turtle.placeUp()
                elseif dir == "down" then
                        return turtle.placeDown()
                else
                        return turtle.place()
                end
        else
            if checkInvetory then
                --print("Could not place any "..name.." "..dir)
            else
                --print("There is no "..name.." in inventory")
            end
        end
        return false
end

--just a little example
for i = 1,10 do
    if place("minecraft:sand","down") then
        sleep(0.5)
    end
end