Fueler

if turtle.getFuelLevel()==0 then
	turtle.refuel()
end

shell.run("go forward down 2 forward 2")
depot=peripheral.wrap("front")

function selectEmpty()
    for i=1,16 do
        turtle.select(i)
        if turtle.getItemCount(i)==0 or turtle.getItemCount(i)==nil then
            return
        end

    end
end

while turtle.getFuelLevel()<turtle.getFuelLimit() do
    item=depot.getItemDetail(1)
    if item~=nil then
        if item.name=="minecraft:lava_bucket" then
            selectEmpty()
            turtle.suck()
            turtle.refuel()
            turtle.drop()
			print("At",turtle.getFuelLevel(),"/",turtle.getFuelLimit(),"fuel.")
        end
    end
end

shell.run("go up 5")